Dental Assistant Quiz
Questions: 16 · 10 minutes
1. Which instrument is primarily used to examine tooth surfaces for small irregularities and deposits?
Dental explorer
Amalgam carrier
Ball burnisher
Impression tray
2. In dental terminology, which direction is described as mesial?
Toward the cheek or lips
Toward the tongue
Toward the dental arch's midline
Away from the dental arch's midline
3. Before a planned procedure, a patient reports taking a prescribed anticoagulant. What should the dental assistant do?
Tell the patient to skip the next dose before treatment
Assume it is irrelevant if the patient is not bleeding now
Remove it from the history because it is not a dental medication
Document the medication and promptly alert the dentist for appropriate evaluation
4. A patient's gums are red and swollen and bleed with gentle probing, but there is no clinical attachment or supporting bone loss. Which condition best fits these findings?
Pulp necrosis
Dental fluorosis
Gingivitis
Periapical abscess
5. While charting, the dentist describes a lesion on the buccal surface of a mandibular molar. Where is that surface located?
Toward the cheek
Toward the tongue
On the chewing surface
Toward the dental arch's midline
6. During ultrasonic scaling, which chairside measure most directly captures spray and aerosols close to the treatment site?
Using only a low-volume saliva ejector at the floor of the mouth
Adding more water through the air-water syringe
Positioning high-volume evacuation close to the operating area
Moving the instrument tray farther from the patient
7. Contaminated reusable instruments have arrived in the designated processing area. What must occur before they are packaged and heat sterilized?
They must be wiped dry without further processing
They must be cleaned to remove blood and other debris
They must be soaked in surface disinfectant as a substitute for cleaning
They must be packaged immediately to limit handling
8. Which tissue forms the hard outer covering of the anatomical crown of a tooth?
Cementum
Dentin
Pulp
Enamel
9. What are bitewing radiographs commonly used to evaluate?
Interproximal caries and the level of crestal bone
The entire length of impacted third molars
Soft-tissue lesions of the tongue and cheeks
Temporomandibular joint movement during opening
10. Which is a primary function of a dental mouth mirror?
Measuring periodontal pocket depth
Providing indirect vision and retracting oral tissues
Removing calculus from root surfaces
Condensing restorative material into a preparation
11. A seated patient becomes pale, reports dizziness, and briefly faints but continues breathing. What is the most appropriate immediate positioning response?
Keep the patient upright and ask them to stand slowly
Place the patient supine, elevate the legs as appropriate, monitor airway and breathing, and alert the dentist
Offer food before changing the chair position
Move the patient to a waiting-room chair for observation
12. A radiograph shows a clear, curved unexposed area along one edge of the image. What is the most likely cause?
The receptor was exposed for too long
The patient moved while the image was being taken
The receptor was placed backward
The position-indicating device was not centered over the receptor
13. What is the main purpose of a matrix band during a proximal restoration?
To determine periodontal pocket depth around the tooth
To isolate the pulp from local anesthetic
To provide a temporary wall and help shape the restoration's contour
To polish the restoration after it has fully set
14. A dental assistant receives a puncture from a contaminated sharp. What is the appropriate immediate response?
Wash the area, report the exposure promptly, and follow the workplace exposure protocol
Cover the puncture and wait until the end of the shift to decide whether to report it
Apply a strong surface disinfectant to the skin and return to work
Squeeze the wound repeatedly and report it only if symptoms appear
15. What is the basic purpose of standard precautions in dental care?
To eliminate the need for a procedure-specific risk assessment
To reserve protective measures for patients with a confirmed infection
To replace instrument sterilization with surface disinfection
To treat blood and certain body fluids from every patient as potentially infectious
16. An alginate impression has been removed, rinsed, disinfected according to protocol, and prepared for the laboratory. Why should it generally be poured promptly?
To make the gypsum set more slowly
To limit dimensional change caused by moisture loss or uptake
To increase the impression material's flexibility
To sterilize the impression through the gypsum reaction