DENTAL ASSISTANT ONLINE EXAM PRACTICE KIT 8
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- 150
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Question 1 of 150
1. Question
1 pointsWhich of the following instruments would you choose to remove temporary cement from around a temporary fabrication?
Correct
Incorrect
Explanation:
The excavator is a versatile tool. It is used to remove temporary cement from around a temporary restoration. It may also be used to remove a temporary crown or bridge.
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Question 2 of 150
2. Question
1 pointsThe operator zone for a right-handed operator will be in which of the following positions?
Correct
Incorrect
Explanation:
A right-handed operator will have his or her operator zone at 7 to 12 o’clock. The treatment area is always set up with the operator in mind.
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Question 3 of 150
3. Question
1 pointsThe principle mass of the teeth is composed of which of the following?
Correct
Incorrect
Explanation:
Teeth are composed of dentin. This is a modified ossified tissue.
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Question 4 of 150
4. Question
1 pointsWhich of the following motions is used with a hatchet?
Correct
Incorrect
Explanation:
Hatchets are used to refine cavity walls and obtain retention in preparation. They are used with a downward motion.
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Question 5 of 150
5. Question
1 pointsHow many times can a person be shocked with a defibrillator?
Correct
Incorrect
Explanation:
Defibrillators should be used with caution. Only shock a patient three times before continuing CPR.
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Question 6 of 150
6. Question
1 pointsWhich of the following instruments would you choose to trim a metal restoration?
Correct
Incorrect
Explanation:
Finishing burs can be used to smooth, trim, and finish metal restorations. They may also be used on natural tooth colored material restorations. They may be used interorally.
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Question 7 of 150
7. Question
1 pointsThe best appointment time for oral surgery on a diabetic patient is
Correct
Incorrect
Explanation:
8:30 a.m.is the best time to schedule oral surgery for a diabetic patient. Medications and breakfast can be consumed so that sugar levels are not compromised.
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Question 8 of 150
8. Question
1 pointsWhich of the following is NOT an appropriate technique for mixing and using dental materials?
Correct
Incorrect
Explanation:
Some materials have limited working time. Do not mix materials until you are sure the operator is ready for them. Have all materials and equipment ready at the start of treatment, and pass materials over the patient’s chin.
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Question 9 of 150
9. Question
1 pointsAn L after the size number of an inverted cone bur indicates which of the following?
Correct
Incorrect
Explanation:
Inverted cone burs are used to remove caries and to make undercuts in preparation for retention. They come in a variety of sizes and may have long or short heads. The smallest size is 33 ½ and the largest is 39. An L after the size number indicates a long instrument head. An S indicates a short instrument head.
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Question 10 of 150
10. Question
1 pointsControlled substances are:
Correct
Incorrect
Explanation:
Controlled substances are drugs regulated and controlled by the federal government. Drugs fall under different classifications according to who can administer them, their how they are stored, and how they are administered. Controlled substances fall under the most stringent requirements and their are different levels of controlled substances.
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Question 11 of 150
11. Question
1 pointsWhich of the following instruments would you select when performing subgingival scaling?
Correct
Incorrect
Explanation:
The curette is the instrument of choice for subgingival scaling, which takes place below the gumline. You may choose either a universal curette or one that is area-specific.
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Question 12 of 150
12. Question
1 pointsWhich of the following is NOT an appropriate technique in one-handed instrument exchange?
Correct
Incorrect
Explanation:
Always grasp new instruments at the end opposite from the working end. Grasp and offer new instruments with your index and middle fingers. Receive used instruments with your little finger.
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Question 13 of 150
13. Question
1 pointsFor which of the following would you NOT choose a periodontal curette?
Correct
Incorrect
Explanation:
The periodontal curette is used to remove subgingival calculus. It is also used to remove soft tissue lining the periodontal pocket, and may be used to smooth the root during root planing
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Question 14 of 150
14. Question
1 pointsWhen preparing a working cast that will need to withstand the stresses of fabricating a prosthesis, which of the following should you choose?
Correct
Incorrect
Explanation:
Working casts should be made of one of the dental stones. This allows the cast to withstand stress as the prosthesis or restoration is fabricated.
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Question 15 of 150
15. Question
1 pointsA cavity that involves three surfaces of the tooth is known as which of the following?
Correct
Incorrect
Explanation:
A cavity which involves three or more tooth surfaces is considered complex. These often require extensive reconstruction.
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Question 16 of 150
16. Question
1 pointsWhich instrument would you choose to remove soft, carious decay from a tooth?
Correct
Incorrect
Explanation:
The spoon excavator is used to remove soft, carious decay. It should be prepared for any dental treatment that involves excavation of cavities or decay. -
Question 17 of 150
17. Question
1 pointsThe process of stabilizing teeth that are loose or have lost bone support is known as which of the following?
Correct
Incorrect
Explanation:
Teeth that are loose or have lost bone support can be supported by nearby intact teeth. This process is known as splinting.
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Question 18 of 150
18. Question
1 pointsWhat would you use if a patient has epilepsy or a history of seizures?
Correct
Incorrect
Explanation:
If a patient has a high risk of seizure, it is important to be prepared. A ligated mouth prop can be positioned at the beginning of the procedure.
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Question 19 of 150
19. Question
1 pointsFor maximum benefit, patients should brush their teeth with fluoridated toothpaste at least how often?
Correct
Incorrect
Explanation:
To receive the maximum benefit from topical fluoride toothpaste, patients should brush their teeth twice a day. Patients with inconsistent brushing habits may need additional fluoride treatment.
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Question 20 of 150
20. Question
1 pointsAdvantages of alginate (irreversible hydrocolloid) impression material include all of the following EXCEPT for:
Correct
Incorrect
Explanation:
Alginates are cheap, flexible, and elastic enough to resume their shape after being removed from the mouth. Alginates are not very rigid and over time can change their shape. For instance, a special caution with alginates is that they can dry out and become distorted.
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Question 21 of 150
21. Question
1 pointsFor which of the following would you NOT use the dental lathe
Correct
Incorrect
Explanation:
The dental lathe should be used to polish cast crowns. It should not be used on provisional crowns. It may also be used to polish appliances and to contour custom trays.
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Question 22 of 150
22. Question
1 pointsHow long should a patient remove his or her dentures each day
Correct
Incorrect
Explanation:
Dentures need to be removed daily. This helps prevent sores and infection. Most people remove them at bedtime. They should be out 6 to 8 hours.
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Question 23 of 150
23. Question
1 pointsWhich of the following arteries provides blood supply to the oral cavity?
Correct
Incorrect
Explanation:
Three branches of the carotid artery provide blood supply to the oral cavity. These are the facial, maxillary, and ligual branches.
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Question 24 of 150
24. Question
1 pointsWhich of the following is NOT true when preparing alginate for an impression?
Correct
Incorrect
Explanation:
Alginate powder should be piled loosely into the scoop, otherwise there is a risk of too much powder for the amount of water. Powder should be fluffed or aerated prior to measurement. Cold water will prolong working time.
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Question 25 of 150
25. Question
1 pointsWhat is a viscous material that sets WITHIN the mouth to a firm consistency and which can also be used to create a mold?
Correct
Incorrect
Explanation:
Impression material is a viscous material, which sets within the patient’s mouth and can later be used to make a mold. Impression material is used to make primary and secondary impressions of the patient’s mouth.
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Question 26 of 150
26. Question
1 pointsThe stroke used to remove calculus from the majority of the surface of a tooth during a scaling is known as which of the following?
Correct
Incorrect
Explanation:
The oblique stroke occurs at a 45 degree angle to the tooth. It is appropriate for scaling the majority of tooth surfaces.
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Question 27 of 150
27. Question
1 pointsWhich of the following is the LARGEST size of round bur?
Correct
Incorrect
Explanation:
Round burs come in a variety of sizes: 1/4, 1/2, 1, 2, 3, 4, 5, 6, 7, 8, and 10. 10 is the largest size of round bur.
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Question 28 of 150
28. Question
1 pointsA patient experiences a seizure during an exam. What should be done first?
Correct
Incorrect
Explanation:
When a patient has a seizure, first remove everything from his or her mouth. Next, clear space around the patient. Never restrain someone having a seizure.
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Question 29 of 150
29. Question
1 pointsThe patient consent form cannot be signed by
Correct
Incorrect
Explanation:
A minor patient cannot sign the patient consent form. By law, minors are not allowed to enter into a contract. Thus, a consent form should be signed by the parent or legal guardian.
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Question 30 of 150
30. Question
1 pointsBlood dyscrasias increases the risk of _____
Correct
Incorrect
Explanation:
Blood dyscrasias are conditions in which the cells of the blood are abnormal. Conditions may affect clotting. This can lead to excessive bleeding.
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Question 31 of 150
31. Question
1 pointsReversible hydrocoilloids are made of which of the following?
Correct
Incorrect
Explanation:
Reversible hydrocolloids can be heated to turn gel into a fluid sol state, and then cooled again to the gel state. This allows the material to flow around teeth and then set into impressions. They are made of agar.
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Question 32 of 150
32. Question
1 pointsWhich of the following is true of fluoride in food?
Correct
Incorrect
Explanation:
The same food, when prepared differently, can have different levels of fluoride. Boiling, roasting, or frying can influence the level of fluoride. Adding fat can also increase the fluoride in a given dish.
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Question 33 of 150
33. Question
1 pointsWhen placing temporary cement, which of the following is recommended?
Correct
Incorrect
Explanation:
Using too much cement or filling the cavity with cement may inhibit the placement of the temporary restoration. It also results in unnecessary wasted material and clean up time. Cement should be placed around the internal margin of the replacement area only.
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Question 34 of 150
34. Question
1 pointsWhich of the following arteries provides blood supply to the lips?
Correct
Incorrect
Explanation:
The facial artery, a branch of the carotid artery, provides blood to the lips. This artery branches into two branches to supply the upper and lower lips.
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Question 35 of 150
35. Question
1 pointsWhich of the following instruments would you select when performing subgingival scaling?
Correct
Incorrect
Explanation:
The curette is the instrument of choice for subgingival scaling. You may choose either a universal curette or one that is area-specific.
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Question 36 of 150
36. Question
1 pointsAll but which of the following is true of a patient who has been properly positioned for four-handed dentistry?
Correct
Incorrect
Explanation:
If the patient is properly positioned, the legs should be slightly lower than the head. Elevating the legs above the head may lead to anxiety or circulation problems. The patient should be supine with no bending at the waist.
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Question 37 of 150
37. Question
1 pointsA patient complains of feeling strange and his or her tongue begins to swell. What type of shock is this?
Correct
Incorrect
Explanation:
All of the answers are different types of shock. Anaphylaxis is a severe allergic reaction. A swollen tongue is associated with anaphylactic shock.
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Question 38 of 150
38. Question
1 pointsWhich of the following instruments would you choose to separate teeth whose contacts are very tight?
Correct
Incorrect
Explanation:
The T-ball burnisher can be used to slightly separate teeth whose contacts are very tight. It may also be used to smooth the rough margins of amalgam restorations and to shape matrix bands.
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Question 39 of 150
39. Question
1 pointsWhich of the following would you use to polish a composite restoration?
Correct
Incorrect
Explanation:
Composite discs are made of a synthetic material impregnated with grit. They are used to polish, refine, and contour composite restorations.
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Question 40 of 150
40. Question
1 pointsPatient health care information is protected by which regulation?
Correct
Incorrect
Explanation:
The Health Information Portability and Accountability Act protects patient’s information. It mandates how protected health information is shared and stored.
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Question 41 of 150
41. Question
1 pointsIrrigation tools are particularly useful if a patient has _____.
Correct
Incorrect
Explanation:
Irrigating devices use water to remove plaque and debris. Anyone may use them, but they are particularly useful for people with bridge work. It is difficult to brush and floss under a bridge, and the water loosens trapped particles.
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Question 42 of 150
42. Question
1 pointsWhich of the following is NOT true of a patient who has been properly positioned for four-handed dentistry?
Correct
Incorrect
Explanation:
When properly positioned, the patient should be supine. His or her oral cavity should be 14 to 16 inches from the operator’s nose. The dental chair should be lowered to within 1 inch of the operator’s lap. The plane of the patient’s forehead should also be parallel with the floor. Patients are always positioned with respect to the operator, not the assistant.
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Question 43 of 150
43. Question
1 pointsYou are collecting clinical data with a patient who has come in complaining that her right upper canine is sensitive to cold. Examination reveals a small hole in the tooth. How would you chart this?
Correct
Incorrect
Explanation:
The right upper (maxillary) canine is numbered 6 in the Universal Numbering System. The lesion is class IV because it appears on the surface of a tooth with an incisory edge.
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Question 44 of 150
44. Question
1 pointsWhat should be administered to a patient who has a heart attack in the office?
Correct
Incorrect
Explanation:
Nitroglycerine is used to treat heart conditions. Patients with heart conditions probably have their own prescription, although vasodilators should be in the emergency kit. Administer the patient’s nitroglycerine along with oxygen while waiting for EMS.
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Question 45 of 150
45. Question
1 pointsDiamond burs are most likely to be used during which of the following types of procedures?
Correct
Incorrect
Explanation:
Diamond burs of different shapes and sizes are most likely to be used during crown preparation. Different diamond burs will be used to rapidly reduce teeth depending on what shape is needed for the crown.
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Question 46 of 150
46. Question
1 pointsDental molds can be used to prepare all EXCEPT for:
Correct
Incorrect
Explanation:
Dental impressions and molds are used to restore the patients teeth or prepare prosthetics made in the dental laboratory. Molds are used to make dentures, crowns, inlays, onlays, dentures, and other dental appliances. Molds are used to make inlays, which are sort of filling made from gold or porcelain. Molds are not used to amalgam fillings, which are prepared directly in the clinic instead of the dental laboratory.
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Question 47 of 150
47. Question
1 pointsWhich of the following would you use along the top edge of an impression tray to give it extra height?
Correct
Incorrect
Explanation:
Utility wax comes in rope form and is pliable at room temperature. It can provide extra height and padding to impression trays, making the impression process more comfortable for the patient.
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Question 48 of 150
48. Question
1 pointsYou might recommend which of the following for a patient who has little strength in the hands?
Correct
Incorrect
Explanation:
Electric toothbrushes require less strength to clean teeth. This option is useful for patients who may be too weak to clean their teeth with a normal toothbrush. Dentists recommend smaller, soft bristle toothbrushes.
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Question 49 of 150
49. Question
1 pointsSplinting is used to do which of the following?
Correct
Incorrect
Explanation:
Teeth that are loose or have lost bone support can be supported by nearby intact teeth. This process is known as splinting.
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Question 50 of 150
50. Question
1 pointsWhich tooth is designated number 1 in the Universal Numbering System?
Correct
Incorrect
Explanation:
The Universal Numbering System assigns a unique number to each tooth, making for easier charting. The right maxillary third molar is designated 1, and the count continues to the left.
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Question 51 of 150
51. Question
1 pointsIn relation to the tube, which way should the raised dot be facing?
Correct
Incorrect
Explanation:
The raised dot is a reference point for taking successful images. It should always face the tube.
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Question 52 of 150
52. Question
1 pointsIf a film cannot be held in place by the patient’s mouth, which of the following should be used
Correct
Incorrect
Explanation:
When a film cannot sit properly in the patient’s mouth, a film holder should be used to set the film. No other person or even the patient should hold the film. If they do, they are exposing other areas of the body to radiation.
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Question 53 of 150
53. Question
1 pointsWhat determines a patient’s x-rays
Correct
Incorrect
Explanation:
Radiation exposure through dental radiography is limited. The benefits are greater than the risks. Generally, the clinical needs of a patient, rather than radiation dose, determine which x-rays are given.
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Question 54 of 150
54. Question
1 pointsAll of the following will cause a dental personnel to exceed occupational radiation limits EXCEPT for:
Correct
Incorrect
Explanation:
Dental personnel are not likely to exceed occupational exposure limits under normal circumstances. However, exposure limits may be exceeded in an office with poor facility design, malfunctioning x-ray equipment or inadequate operating procedures. Billing and administrative procedures will not have an effect on occupational radiation exposure.
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Question 55 of 150
55. Question
1 pointsWhen radiographing an endentulous adult patient, exposure time:
Correct
Incorrect
Explanation:
Exposure time for endentulous patients should be decreased. Due to the fact that the patient has no teeth, proper film placement is based on anatomical structures.
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Question 56 of 150
56. Question
1 pointsWhat protects intraoral film from contamination while in the patient’s mouth?
Correct
Incorrect
Explanation:
The barrier envelope is use to protect the film from contamination. It can also protect against spreading germs among staff. The foil backing and white plastic side are parts of the standard film packet
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Question 57 of 150
57. Question
1 pointsA safe working practice for dental personnel includes:
Correct
Incorrect
Explanation:
Dental personnel should practice safe working habits. They should not stand close to x-ray equipment while in use or linger unnecessarily in the x-ray room. Additionally, the x-ray machine should be turned off when not in use.
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Question 58 of 150
58. Question
1 pointsThe type of film holder used for extraoral film is the:
Correct
Incorrect
Explanation:
The frame holder is the most common type of film holder for extraoral film. Clip and hinge holders are used primarily for intraoral film.
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Question 59 of 150
59. Question
1 pointsWhat occurs when the film is bent?
Correct
Incorrect
Explanation:
Dark lines appear when the film is bent. This can be prevented with the correct placement of the film. The correct packaging is also important.
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Question 60 of 150
60. Question
1 pointsTo locate mandibular molars mounted on the view, look for how many roots?
Correct
Incorrect
Explanation:
When viewing mandibular molars on film, they are easily distinguished from maxillary molars by the one less root.
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Question 61 of 150
61. Question
1 pointsThe film badge meter is meant to be used how many times?
Correct
Incorrect
Explanation:
The film badge dosimeter is designed to only be used one time. When the film badge is returned to the monitoring organization, the information is processed and the badge itself is made as a permanent record of the exposure. The employee is issued a new badge when they return their current film badge. -
Question 62 of 150
62. Question
1 pointsIt is recommended that a person should not be exposed to radiation more than a whole body dose of rem. What is rem?
Correct
Incorrect
Explanation:
The amount of radiation exposure is often measured in rem, which is equivalent to rad measurements. In general, it is recommended that the level of radiation must not exceed a whole body dose (in rems) of five times the number of years beyond age 18.
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Question 63 of 150
63. Question
1 pointsWhat is MOST true of the tooth highlighted in white?
Correct
Incorrect
Explanation:
The fact that the tooth is highlighted in bright white, is an indication that it is not a natural tooth. The long stem-like attachment to the tooth is the pin that is used to secure the tooth.
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Question 64 of 150
64. Question
1 pointsOf the following children, which patient would be MOST sensitive to radiation?
Correct
Incorrect
Explanation:
The 3 year old patient will be the most sensitive to radiation. The dentist will determine the radiation risks relative to the diagnostic benefit. In any case, the goal in dental radiography is always to minimize exposure.
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Question 65 of 150
65. Question
1 pointsLines on a film image are the result of:
Correct
Incorrect
Explanation:
Film bending will cause lines to appear on the film. It will also cause improper angulation of the central X-ray beam.
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Question 66 of 150
66. Question
1 pointsPrimary radiation is radiation received from what?
Correct
Incorrect
Explanation:
Primary radiation is radiation direct from the dental machine. The radiation is normally focused on the patient, who has been prepped and prepared for the exposure. The dental x-ray technician should never receive primary radiation, since radiation direct from the source is stronger and can be dangerous to the unprepared worker.
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Question 67 of 150
67. Question
1 pointsOf the following, what is true of the image?
Correct
Incorrect
Explanation:
Bitewing x-rays give a picture of the upper and lower back teeth, which this image does. There are no indications of any dental problems.
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Question 68 of 150
68. Question
1 pointsTo minimize patient risk, all of the following are proper procedures, except
Correct
Incorrect
Explanation:
You should use a fast speed film in order to protect the patient from radiation. Slower film speeds take longer to finish and therefore use more radiation to complete the x-ray.
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Question 69 of 150
69. Question
1 pointsHow will a 15 kVp increase affect density
Correct
Incorrect
Explanation:
The higher the kVp, the greater the density. For every increase of 15 kVp, the density will double.
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Question 70 of 150
70. Question
1 pointsGenetic information is necessary for the production and functioning of a new organism. Genetic information is contained in what part of the germ (sperm or ova) cell?
Correct
Incorrect
Explanation:
Genetic information is contained chromosomes in the sperm and ovum. These cells contain 23 chromosomes each, which are paired during fertilization of the ovum.
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Question 71 of 150
71. Question
1 pointsHow many types of position indicating devices (PID) are available?
Correct
Incorrect
Explanation:
The three types of PIDs are rectangle, round, and conical. Rectangle is the most preferred PID because it reduces the risk of scatter radiation and can be concentrated to one area. Round PIDs are rarely used unless they are under a rectangle frame. Conical PIDs are no longer used during procedures due to their high risk of scatter radiation and increased exposure to the patient.
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Question 72 of 150
72. Question
1 pointsPatient effective dose for bitewing x-rays of the full mouth is:
Correct
Incorrect
Explanation:
The patient effective dose for bitewing x-rays of the full mouth is 1.5 mrem. This dose is slightly less than four times the amount of a single bitewing x-ray dose.
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Question 73 of 150
73. Question
1 pointsWhat causes emulsion tears?
Correct
Incorrect
Explanation:
When wet films touch, they take emulsion off each other. This is an emulsion tear. Tearing can also be caused by fingernails and placement too close to the edge of the processor.
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Question 74 of 150
74. Question
1 pointsAn x-ray’s suitable penetrating power ranges from
Correct
Incorrect
Explanation:
The acceptable range for kilovolt peak is 50-10 kVp. This is the penetrating power of the x-ray beam.
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Question 75 of 150
75. Question
1 pointsWhere does the incisive foramen appear?
Correct
Incorrect
Explanation:
The incisive foramen appears in between the two central incisors. This structure is a radio-lucent landmark of maxillary radiographs. It may also appear as a radio-lucent feature near the cuspid or lateral incisor borders.
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Question 76 of 150
76. Question
1 pointsWhen the embossing pattern from the lead foil backing in the film packet appears on the X-ray:
Correct
Incorrect
Explanation:
When the film has been placed into the X-ray machine backwards, the embossing pattern from the lead foil backing in the film packet will appear on the X-ray. It is for this reason that the dental operator must ensure the film is placed into the X-ray machine properly.
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Question 77 of 150
77. Question
1 pointsDuring manual processing, to obtain optimum fixing, the film must remain in the fixer solution for:
Correct
Incorrect
Explanation:
For optimum fixing, radiographic film should be left in the fixer solution for 10 minutes. If a film is not properly fixed, it will be brown or faded.
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Question 78 of 150
78. Question
1 pointsWhen the parent of a patient does not want their child to receive an X-ray, the dental worker should:
Correct
Incorrect
Explanation:
There are times when a parent does not want their child to receive an X-ray. In these situations, the dentist should be informed and a note regarding the refusal should be noted in the patient’s chart.
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Question 79 of 150
79. Question
1 pointsThe X-ray image may be damaged if:
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Explanation:
If the film is left in the wash water for an extended period of time, the image may be damaged. The developing solution should always be stirred and the continuous agitation of the water in the rinse cycle is required.
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Question 80 of 150
80. Question
1 pointsThe main purpose of designating certain areas as controlled or restricted is to:
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Explanation:
The main purpose of designating certain areas as “controlled” is to protect not only the patients but other staff who work in the dental office. Controlled areas help to minimize occupational exposure to staff.
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Question 81 of 150
81. Question
1 pointsThe result of immersing contaminated exposed film packets in a disinfecting solution is:
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Incorrect
Explanation:
Exposed film packets should never be immersed in a disinfecting solution. Immersing them in any liquid will destroy the image. It is acceptable to wipe the exposed film with a dry paper towel to remove any saliva or blood.
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Question 82 of 150
82. Question
1 pointsWhat is the most important step the dentist can take to protect patients from x-radiation?
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Incorrect
Explanation:
Radiographs are normally ordered once it is determined that the benefit of the radiographs outweighs the risk of the patient being exposed. The best way the dentist can protect their patients from x-radiation is to order only procedures that are needed and eliminate excessive or unimportant radiographs. The less the patient has to have radiographs performed is less time they spend exposed to the radiation.
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Question 83 of 150
83. Question
1 pointsWhat will help limit patient movement during an intraoral exposure?
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Explanation:
Patient movement will blur images. A headrest will help limit movement and prevent blurred images.
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Question 84 of 150
84. Question
1 pointsWhich size film would you use for the bisecting technique?
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Incorrect
Explanation:
Bisecting technique requires the same size film for the anterior and posterior teeth. The parallel technique use size 1 for the anterior and size 2 for the posterior.
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Question 85 of 150
85. Question
1 pointsWhen preparing a radiation contingency plan, which federal agency can provide information on occupational safety?
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Incorrect
Explanation:
The Occupational Safety and Health Administration can provide employers information to help protect employees and create a safe working environment. The EPA and FDA also contain information on radiation safety and materials.
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Question 86 of 150
86. Question
1 pointsRadiograph mounts typically indicate what during viewing?
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Explanation:
When viewing mounted radiographs, the dental arches are indicated by the position of the maxillary and madibular jaw lines. Based on these positions, the radiographer can determine if the films are correctly aligned and at what position the head is facing
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Question 87 of 150
87. Question
1 pointsHow often should x-rays be tested for quality control
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Explanation:
It is necessary to test and calibrate equipment to ensure quality. This should be done yearly. Follow manufacturer guidelines if they recommend more frequent testing.
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Question 88 of 150
88. Question
1 pointsAll of the following factors affect patient exposure to radiation. However, which factor can the dental radiograph operator manipulate to minimize radiation dose while capturing images?
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Incorrect
Explanation:
The processing environment and method has a significant impact on the level radiation patients are exposed to in dental radiography. Operators must ensure they take and develop films correctly. Otherwise, the patients are subjected to re-takes. While capturing images, the operator can manipulate the beam alignment and patient position to ensure optimal quality images.
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Question 89 of 150
89. Question
1 pointsFor quality assurance purposes, all of the following should be checked on a daily basis except:
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Incorrect
Explanation:
Darkroom operations should be performed on a quarterly basis. Filtration systems should be checked annually and after servicing.
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Question 90 of 150
90. Question
1 pointsFilm hangers should be cleaned in a solution of water and
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Incorrect
Explanation:
Film hangers should be cleaned in a solution of water and sodium bicarbonate. The film hangers should be soaked for one hour at 100-125 degrees.
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Question 91 of 150
91. Question
1 pointsWhat should be done before the patient’s chin tilt is adjusted?
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Incorrect
Explanation:
There are 10 steps necessary for a panoramic radiograph. Before adjusting the chin tilt, the patient needs to bite the bite rod.
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Question 92 of 150
92. Question
1 pointsWhat occurs when the horizontal angulation is not calculated correctly
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Incorrect
Explanation:
Horizontal angulation must be aimed at the perpendicular to the arch’s curve. When the angle is not correct, the image will be overlapping. This makes it difficult to see interproximal spaces.
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Question 93 of 150
93. Question
1 pointsWhat happens if the chemistry is depleted when developing a panoramic film?
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Incorrect
Explanation:
Weak chemistry creates a weak picture. The image will appear washed out if the chemistry is depleted. Panoramics are large and may deplete chemistry faster
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Question 94 of 150
94. Question
1 pointsWhat is the proper way to change the bank of bulbs on a radiographic viewbox?
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Incorrect
Explanation:
Radiograph viewboxes should be maintained on a regular basis. The entire bank of bulbs should be changed simultaneously.
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Question 95 of 150
95. Question
1 pointsThe x-ray displays an image of which of the following?
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Incorrect
Explanation:
The implant is highlighted in white. The roots are stem-like, typically made of titanium and attached to the implant.
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Question 96 of 150
96. Question
1 pointsWhat is one way to cause unnecessary radiation exposure to the patient?
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Incorrect
Explanation:
When radiograph technical or user errors occur, this causes an error in the patient’s films and image results, which in turn require the radiographs to be retaken. If a procedure has to be duplicated due to errors, this causes unnecessary radiation exposure to the patient and increases their risk for radiation damage.
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Question 97 of 150
97. Question
1 pointsMovement of the X-ray tube during exposure can result in a
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Incorrect
Explanation:
When the X-ray tube is moved during exposure, a blurred image will result. Other causes of blurred images include patient and film movement.
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Question 98 of 150
98. Question
1 pointsTo mount radiographs, the radiographer must have a knowledge of:
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Incorrect
Explanation:
To mount radiographs, the radiographer must have a knowledge of normal anatomy. Determining a diagnosis is not the responsibility of the radiographer.
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Question 99 of 150
99. Question
1 pointsHow often do the you need to change the solution for a processor that does not use rollers?
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Incorrect
Explanation:
Many automatic processors only need to be changed out every three weeks. Processors without rollers are slightly different. They needs to be changed every two weeks
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Question 100 of 150
100. Question
1 pointsOf the following, which is the second step of assessing risk of infection in a dental office?
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Incorrect
Explanation:
When assessing risk for infection, a five stage process should be followed. These are: Stage 1 – “Look for the hazards.” Stage 2 – “Identify who is at risk.” Stage 3 – “Determine the level of risk.” Stage 4 – “Record what you find.” Stage 5 – “Review your assessment.”
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Question 101 of 150
101. Question
1 pointsThe dental assistant has begun sterilizing “noncritical” items, as defined by the CDC. Of the following, which would NOT fit in the “noncritical” category?
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Explanation:
With regard to the infection control (cleaning, disinfecting, and sterilizing) of patient care items, the CDC has outlined three categories based on the risk of infection when being used. These categories are critical, semicritical and noncritical. Special care must be given to “critical” items as they can be used to enter the bloodstream. Semicritical items come in contact with mucous membranes but they do not enter the bloodstream. Noncritical items contact the surface of the skin.
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Question 102 of 150
102. Question
1 pointsJerry is putting away a series of disinfectants after sterilizing the work area. Where in the office can he find the list of potential hazards for each chemical?
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Explanation:
The MSDS is a form provided in a occupational setting that lists the properties of various chemicals and other substances. It is intended to provide workers with instructions for handling or working with the substance in a safe manner, including information such as physical data, toxicity, health effects, first aid, storage, disposal, protective equipment, and spill-handling procedures. According to OSHA, these forms are required to be readily available to every employee and state that no chemical should be handled if it is not included here.
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Question 103 of 150
103. Question
1 pointsWhat does the CDC recommend for disinfection
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Explanation:
The CDC recommends using Rapid disinfectants. These activate within 1 to three minutes. Others take up to 10 minutes.
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Question 104 of 150
104. Question
1 pointsDental office should review new equipment for safety and engineering improvements:
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Incorrect
Explanation:
OSHA requires dental offices review new equipment for safety and engineering improvements annually. Additionally, dental offices should involve non-managerial workers in evaluating potential equipment.
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Question 105 of 150
105. Question
1 pointsThe dental assistant is using sealed glass ampules of bacterial endospores to monitor sterilization. What type of monitoring is being used?
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Incorrect
Explanation:
There are three types of sterilization monitoring. These are biological, process indicators and dosage indicators.
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Question 106 of 150
106. Question
1 pointsOccupational Safety and Health Administration regulations for dental offices relate to all of the following except:
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Incorrect
Explanation:
Dental procedure and care for patients is not stipulated by the Occupational Safety and Health Administration. Other organizations, such as the American Dental Association, establish patient care guidelines for this profession. OSHA regulations for dentistry pertain to personal protective equipment, housekeeping, employee medical records and other worker safety issues.
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Question 107 of 150
107. Question
1 pointsFor periodic maintenance of antiretraction mechanisms, dental personnel should:
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Incorrect
Explanation:
Dental personnel should contact the dental unit manufacturer for periodic maintenance of antiretraction mechanisms. Each unit will have specific requirements.
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Question 108 of 150
108. Question
1 pointsA dental laser can damage to which of the following with prolonged use?
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Explanation:
Dental lasers are extremely bright. They can cause retinal damage. It is important never to look directly at the laser. -
Question 109 of 150
109. Question
1 pointsWith regard to sterility assurance, the dental assistant must conduct the second step of the program. Of the following, which is the second step?
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Incorrect
Explanation:
Sterility assurance is a critical program implemented to help make sure the proper procedures are being chosen, implemented and performance monitored. The four-step process is as follows: Step 1: Choose the procedure and identify the proper way to carry it out. Step 2: Create a step-by-step guide outlining the correct procedure. Step 3: Integrate procedure into office training program. Step 4: Monitor performance of the procedure.
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Question 110 of 150
110. Question
1 pointsDental health workers must clean their hands after all of the following except for after:
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Incorrect
Explanation:
Dental health workers should wash or clean their hands before donning gloves. It is not necessary to clean the hands after donning gloves, but it is necessary after removing the contaminated gloves. It is also necessary to clean the hands after direct patient contact, touching contaminated equipment or handling waste.
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Question 111 of 150
111. Question
1 pointsA dental assisting team is constantly looking for ways to improve safety in their office. Recently a task force has been assembled to review practices and equipment. The team is looking at ways to improve radiation safety so they:
Correct
Incorrect
Explanation:
Quality improvement in a dental office involves reviewing and checking existing equipment. To ensure radiation safety, the assistants should check all radiation sources as well as contacting equipment manufacturers
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Question 112 of 150
112. Question
1 pointsWhich of the following disinfecting chemicals would the dental assistant use to clean the walls of the office?
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Incorrect
Explanation:
Walls and floors in the dental office that do not contain visible blood are considered noncritical surfaces and therefore only require low-level disinfecting. Of the preceding choices, Quaternary ammonium compounds are the only example of a low-level disinfectant. Glutaraldehydephenate and peraceetic acid can be used as sterilants and high-level disinfectants. Iodophors are intermediate-level disinfectants.
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Question 113 of 150
113. Question
1 pointsWhen recapping anesthetic needles, a healthcare worker should use:
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Incorrect
Explanation:
Anesthetic needles should be recapped using the one-handed scoop technique. The dental team should never use a two-handed recapping procedure
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Question 114 of 150
114. Question
1 pointsWhich of the following is used to handle chemicals?
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Incorrect
Explanation:
Utility gloves are used in situations that do not involve patients. Utility gloves are used when handling chemicals.
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Question 115 of 150
115. Question
1 pointsThe most common infections occupationally transmitted via sharps injuries during patient care are:
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Incorrect
Explanation:
The most common infections occupationally transmitted via sharps injuries during patient care are Hep B, Hep C, and HIV. Another occupationally transmitted infection is tuberculosis.
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Question 116 of 150
116. Question
1 pointsWhat is a benefit of a chemiclave or chemical vapor sterilization?
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Incorrect
Explanation:
The autoclave can cause materials to rust and dull. The chemical vapor of a chemiclave reduces rust. Chemical vapor does require ventilation to be effective.
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Question 117 of 150
117. Question
1 pointsMercury requires which technique when it is being used?
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Incorrect
Explanation:
Mercury is easily absorbed into the skin. This is why there is a no touch technique when handling mercury. Mercury is usually in capsules.
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Question 118 of 150
118. Question
1 pointsWhich of the following is a droplet method of infection?
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Incorrect
Explanation:
A cold is a droplet method of infection that is spread through aerosols. It occurs at every transmission level. It can be prevented with PPE and proper hand washing
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Question 119 of 150
119. Question
1 pointsPseudomonas aeruginosa is found in the office’s dental unit water. Which of the following MOST likely describes the probable source and pathogenicity of the bacteria?
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Incorrect
Explanation:
The two main probable sources of the spread of bacteria are via water and the mouth. Pathogenicity can be “low” or “opportunistic”.
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Question 120 of 150
120. Question
1 pointsShoes need to be ____
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Incorrect
Explanation:
Shoes should be closed toed to prevent accidental injury and contamination. Open shoes leave the wearer open to contaminates and pathogens. Shoes should also be comfortable.
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Question 121 of 150
121. Question
1 pointsIt’s a busy day and you are working on a patient, and called to another room to examine another patient. What is the MOST effective way to prevent cross contamination and transmission of disease?
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Incorrect
Explanation:
Proper hand hygiene is the most critical measure taken in the health care profession to prevent cross contamination and disease transmission. Changing your gown, protective eyewear and face mask may be beneficial but since they should not have direct contact with the patient, it is not the MOST beneficial.
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Question 122 of 150
122. Question
1 pointsGloves should be discarded:
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Incorrect
Explanation:
Dental professionals should discard and change gloves between each patients. Dental professionals should never touch their faces, patient charts, pens, computers or anything besides the patient and necessary equipment while gloved. Gloves should be changed during very long or dirty procedures.
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Question 123 of 150
123. Question
1 pointsThe dental assistant is using a chemical that has the preceding symbol displayed on the container, What does the symbol mean?
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Incorrect
Explanation:
The National Fire Protection Association has developed a color-coded system that’s used to describe flammability, health, reactivity and special hazards associated with chemicals. “Special hazards” includes symbols for “radioactive”, “poison”, “oxidizing agent” and “water reactive”. “Radioactive” is represented by a trefoil symbol.
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Question 124 of 150
124. Question
1 pointsAccording to OSHA’s Blood borne Pathogen’s standards, what should be done with a specimen that can puncture a primary container?
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Incorrect
Explanation:
A secondary container is necessary for primary containers that may leak or be contaminated. Primary containers may be punctured. These need to be placed in secondary containers that are puncture proof.
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Question 125 of 150
125. Question
1 pointsTo protect the health of dental professionals and dental patients, the American Dental Association (ADA) and Centers for Disease (CDC) control have recommended that dental professionals consider all patients as potentially infectious. The basis for this recommendation is:
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Incorrect
Explanation:
The ADA and CDC recommends dental workers take caution because dental patients and workers may be exposed to a variety of pathogens via blood, oral secretions or respiratory aerosol. Additionally, some patients may be unaware they have an infection or fail to disclose they do have an infection.
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Question 126 of 150
126. Question
1 pointsWhat is used to mark the date on a packet being sterilized?
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Incorrect
Explanation:
The contents of a packet need to be labeled. The date must also be labeled. A pencil will not dissolve or bleed like ink will.
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Question 127 of 150
127. Question
1 pointsThe level of risk categories on the health hazard labels range from 0 to 4. What category would “Warning: Corrosive or toxic” fall under?
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Incorrect
Explanation:
The categories on the label of the health hazard are as follows: 0 – No unusual hazard 1 – Caution: May cause irritation 2 – Warning: Harmful if inhaled 3 – Warning: Corrosive or toxic 4 – Danger: May be fatal
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Question 128 of 150
128. Question
1 pointsWhat occurs when tubes with biofilm are flushed?
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Incorrect
Explanation:
Biofilm can builds up in water lines. Over time, it will shed fragments. Flushing the line will cause the biofilm to slough off the tubes.
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Question 129 of 150
129. Question
1 pointsWhich of the following is a source of bacteria that should not be touched without washing hands afterward?
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Incorrect
Explanation:
Cell phones are carriers of bacteria. Touching cell phones throughout the day transfers the bacteria to patients. This is a dangerous method of cross contamination
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Question 130 of 150
130. Question
1 pointsWhat occurs when equipment is contaminated?
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Explanation:
Indirect contact occurs when an object is contaminated. Touching the object is indirect contact. This spreads the contaminants.
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Question 131 of 150
131. Question
1 pointsHand pieces should be flushed with _____.
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Incorrect
Explanation:
Hand pieces need to be flushed before it is used. It is also flushed between patients. The hand piece should be flushed with air water.
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Question 132 of 150
132. Question
1 pointsBioburden consists of:
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Incorrect
Explanation:
These are the components of bioburden. Bioburden is normally defined as the number of bacteria living on a surface that has not been sterilized.
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Question 133 of 150
133. Question
1 pointsWhat should not be used in dental rooms?
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Incorrect
Explanation:
Carpet is not recommended in dental offices. Mercury and other substances can be trapped in carpet. Vacuuming can cause mercury to be released into the air.
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Question 134 of 150
134. Question
1 pointsWhich of the following is true of standard sterilization wraps?
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Incorrect
Explanation:
The FDA does not allow for the re-use of standard sterilization wraps. Doing so could negatively affect the chemical indicator’s ability as well as prevent the instruments from maintaining sterility once processed.
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Question 135 of 150
135. Question
1 pointsWhat offers control of materials being sterilized and prevents accidental punctures?
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Incorrect
Explanation:
The cassette is used in both the disinfection and sterilization process. It is used to protect employees from punctures. It is also used to control the items being sterilized
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Question 136 of 150
136. Question
1 pointsWhat should be done with a wheel after it is used to polish?
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Incorrect
Explanation:
The polish wheel needs to be sterilized after it is used. This should be done in the autoclave. There are also disposable wheels.
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Question 137 of 150
137. Question
1 pointsWhat should the pressure be when opening the door to the autoclave?
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Incorrect
Explanation:
Care must be taken when opening the autoclave door. The pressure should be at zero. The temperature should also be zero.
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Question 138 of 150
138. Question
1 pointsOf the following, which is not considered an acute symptom associated with exposure to nitrous oxide, as per OSHA?
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Incorrect
Explanation:
Acute symptoms are sharp or sudden. In addition to dizziness, irritability and difficulty breathing, OSHA has documented fatigue and headache with exposure to nitrous oxide.
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Question 139 of 150
139. Question
1 pointsThe baseline of nitrous oxide used should be determined. It is crucial that the least amount, but most effective amount be used in a patient. What is typically the most amount of nitrous oxide to be used in an adult patient?
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Explanation:
The baseline ratio should be observed, as the patient is relaxed, but also coherent. The least, but most effective amount should be used in each patient. Although it may vary among patients, 30% is generally the standard in adults, while it is less in children.
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Question 140 of 150
140. Question
1 pointsSkin integrity reduces _____ in the chain of infection
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Incorrect
Explanation:
Susceptibility is a link in the chain of infection. Maintaining skin integrity reduces susceptibility. This reduces the risk of infection.
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Question 141 of 150
141. Question
1 pointsWhich infectious waste material may be disposed of differently?
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Incorrect
Explanation:
Patients may want to keep their teeth. Children may want them for the tooth fairy. If a tooth is returned it is no longer infectious waste. Local regulations govern the return of teeth.
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Question 142 of 150
142. Question
1 pointsWhat is Not always necessary when handling a contaminated tray?
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Incorrect
Explanation:
Handling contaminated trays may or may not create aerosol contaminants. A mask is not needed if there is no aerosol. The other PPE items are necessary.
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Question 143 of 150
143. Question
1 pointsWhy are standard precautions not sufficient enough to protect the DHCP while treating a patient with active TB?
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Incorrect
Explanation:
The M. tuberculosis nuclei is an airborne pathogen, but the standard PPE surgical mask is unable to prevent inhalation of this organism and therefore can put the DHCP at risk for contracting TB. Extended precautions should be taken for active TB patients in the office, such as prompt isolation of the patient. Future patients should be deferred until it is confirmed the patient is no longer infectious.
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Question 144 of 150
144. Question
1 pointsWhat course of action should an employee take if proper infection control precautions are not met?
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Incorrect
Explanation:
The Blood borne Pathogens Standard is implemented by OSHA. This standard is meant to protect employees from infection. OSHA should be contacted if the standard is not met.
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Question 145 of 150
145. Question
1 pointsUsed barriers are examples of which of the following?
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Incorrect
Explanation:
Contaminated waste has come in contact with bodily fluids. Disposal may be regulated by the state or local government. It is typically disposed of with general waste.
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Question 146 of 150
146. Question
1 pointsWhich of the following will help prevent injury to the hands and wrist?
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Incorrect
Explanation:
Leverage will decrease the amount of pressure used by the hands and wrists. This decreases the risk of injury. The other answers will increase the risk of injury.
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Question 147 of 150
147. Question
1 pointsWhat is the first step of glove removal?
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Incorrect
Explanation:
There are two steps to removing glove. The first step is tucking one finger into the cuff of the other glove to invert it.
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Question 148 of 150
148. Question
1 pointsGoggles and glasses are _____ after each use.
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Incorrect
Explanation:
Glasses and goggles are worn for eye protection. These are not typically disposable. They should be disinfected after each use.
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Question 149 of 150
149. Question
1 pointsThe exposure control plan must be readily available to _____
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Incorrect
Explanation:
Exposure control plans are required in dental facilities by OSHA, and must meet several criteria. In addition to the plan being readily available to all workers, it must be written with specifics to each facility, and reviewed and updated each year. -
Question 150 of 150
150. Question
1 pointsWhat should be done with pumice after polishing in the lab?
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Incorrect
Explanation:
Pumice is used for polishing in the lab. It cannot be sterilized or disinfected. It needs to be disposed of after it is used.