NDAEB SAMPLE QUESTIONS WITH 100%
CORRECT ANSWERS
In relation to dental radiography, which one of the following terms refers to the anatomical landmark
used to identify a maxillary canine periapical film?
1. Maxillary sinus.
2. Mental foramen.
3. Bifurcated roots.
4. Maxillary tuberosity. - correct answer -1. Maxillary Sinus
Prior to exposing a dental radiograph/image, placement of the lead apron over the patient protects
which one of the following tissues?
1. Vascular.
2. Gonadal.
3. Muscular.
4. Digestive. - correct answer -2. Gonadal
A blood pressure cuff should be placed over which one of the following arteries?
1. Pulmonary.
2. Brachial.
3. Carotid.
4. Radial. - correct answer -2. Brachial
Which three factors are essential in order to produce accurate diagnostic casts?
1. Water to powder ratio, temperature of gypsum and force of mixing.
2. Water temperature, form of gypsum used and force of mixing.
3. Water to powder ratio, mixing time and water temperature.
4. Type of spatula used, vibration and water temperature. - correct answer -3. Water to powder ratio,
mixing time, and water temperature
What is the name of the adhesive film which retains bacterial colonies to the teeth?
1. Striae.
2. Pellicle.
3. Calculus.
4. Materia alba. - correct answer -2. Pellicle
Which one of the following radiographic images is most useful in detecting interproximal caries?
1. Panoramic.
, 2. Periapical.
3. Bite-wing.
4. Occlusal. - correct answer -3. Bite-wing
Which one of the following fluids provides lubrication during the movements of the temporomandibular
joint?
1. Blood.
2. Saliva.
3. Synovial fluid.
4. Lymphatic fluid. - correct answer -3. Synovial Fluid
What is the correct way to store scrap amalgam?
1. In a plastic waste container.
2. In a glass container filled with water.
3. In a metal container with sodium hypochlorite.
4. In a tightly closed mercury recycling container. - correct answer -4. In a tightly closed mercury
recycling container
In a steam sterilizer, the distilled water is converted to steam then condensed back into liquid water.
What happens to the condensed water?
1. It is drained from the sterilizer and discarded down the drain in the sink.
2. The sterilizer continues to convert the water to steam over and over.
3. It runs directly from the sterilizer into the sewage system.
4. It must be collected as contaminated liquid waste. - correct answer -1. It is drained from the sterilizer
and discarded down the drain in the sink
A patient presents to the dental office with concerns about sensitivity on a lower canine tooth. The
dentist performs an examination and diagnoses gingival recession and abrasion on the facial root
surface of tooth 33. The patient has 100% dental insurance coverage for diagnostic, preventive and
restorative services.
What is the etiology of the sensitivity?
1. Exposed pulp.
2. Exposed dentinal tubules.
3. Hypersensitive dentogingival fibers.
4. Damaged periodontal ligament fibers. - correct answer -2. Exposed dentinal tubules
A patient presents to the dental office with concerns about sensitivity on a lower canine tooth. The
dentist performs an examination and diagnoses gingival recession and abrasion on the facial root
surface of tooth 33. The patient has 100% dental insurance coverage for diagnostic, preventive and
restorative services.
Which one of the following conditions could cause the tooth pathology?
1. Use of an abrasive dentifrice.
2. Fingernail biting.
CORRECT ANSWERS
In relation to dental radiography, which one of the following terms refers to the anatomical landmark
used to identify a maxillary canine periapical film?
1. Maxillary sinus.
2. Mental foramen.
3. Bifurcated roots.
4. Maxillary tuberosity. - correct answer -1. Maxillary Sinus
Prior to exposing a dental radiograph/image, placement of the lead apron over the patient protects
which one of the following tissues?
1. Vascular.
2. Gonadal.
3. Muscular.
4. Digestive. - correct answer -2. Gonadal
A blood pressure cuff should be placed over which one of the following arteries?
1. Pulmonary.
2. Brachial.
3. Carotid.
4. Radial. - correct answer -2. Brachial
Which three factors are essential in order to produce accurate diagnostic casts?
1. Water to powder ratio, temperature of gypsum and force of mixing.
2. Water temperature, form of gypsum used and force of mixing.
3. Water to powder ratio, mixing time and water temperature.
4. Type of spatula used, vibration and water temperature. - correct answer -3. Water to powder ratio,
mixing time, and water temperature
What is the name of the adhesive film which retains bacterial colonies to the teeth?
1. Striae.
2. Pellicle.
3. Calculus.
4. Materia alba. - correct answer -2. Pellicle
Which one of the following radiographic images is most useful in detecting interproximal caries?
1. Panoramic.
, 2. Periapical.
3. Bite-wing.
4. Occlusal. - correct answer -3. Bite-wing
Which one of the following fluids provides lubrication during the movements of the temporomandibular
joint?
1. Blood.
2. Saliva.
3. Synovial fluid.
4. Lymphatic fluid. - correct answer -3. Synovial Fluid
What is the correct way to store scrap amalgam?
1. In a plastic waste container.
2. In a glass container filled with water.
3. In a metal container with sodium hypochlorite.
4. In a tightly closed mercury recycling container. - correct answer -4. In a tightly closed mercury
recycling container
In a steam sterilizer, the distilled water is converted to steam then condensed back into liquid water.
What happens to the condensed water?
1. It is drained from the sterilizer and discarded down the drain in the sink.
2. The sterilizer continues to convert the water to steam over and over.
3. It runs directly from the sterilizer into the sewage system.
4. It must be collected as contaminated liquid waste. - correct answer -1. It is drained from the sterilizer
and discarded down the drain in the sink
A patient presents to the dental office with concerns about sensitivity on a lower canine tooth. The
dentist performs an examination and diagnoses gingival recession and abrasion on the facial root
surface of tooth 33. The patient has 100% dental insurance coverage for diagnostic, preventive and
restorative services.
What is the etiology of the sensitivity?
1. Exposed pulp.
2. Exposed dentinal tubules.
3. Hypersensitive dentogingival fibers.
4. Damaged periodontal ligament fibers. - correct answer -2. Exposed dentinal tubules
A patient presents to the dental office with concerns about sensitivity on a lower canine tooth. The
dentist performs an examination and diagnoses gingival recession and abrasion on the facial root
surface of tooth 33. The patient has 100% dental insurance coverage for diagnostic, preventive and
restorative services.
Which one of the following conditions could cause the tooth pathology?
1. Use of an abrasive dentifrice.
2. Fingernail biting.
