NBDE Part II - 1993 Exam B QUESTIONS
AND ANSWERS ALL CORRECT
The Occupational Safety and Health Administration (OSHA) is concerned with
regulated waste within the office. The Environmental Protection Agency (EPA)
regulates the transportation of waste from the office.
A. Both statements are TRUE.
B. Both statements are FALSE.
C. The first statement is TRUE, the second is FALSE.
D. The first statement is FALSE, the second is TRUE. Correct Answer: A. Both
statements are TRUE.
After the dentist has completed an etching procedure on a Class III composite
preparation, the preparation becomes contaminated with saliva. In response, the
dentist should do which of the following?
A. Blow away the saliva with air, then proceed
B. Rinse away the saliva with water, dry the preparation, then proceed
C. Wipe away the saliva with a cotton pellet, rinse the preparation with water, dry
it with air, then proceed
D. Rinse away the saliva with water, dry the preparation with air, then repeat the
etching procedure Correct Answer: D. Rinse away the saliva with water, dry the
preparation with air, then repeat the etching procedure
Which of the following eruption sequences is most commonly found in the primary
dentition?
A. Central incisor, lateral incisor, canine, first molar, and second molar
B. Central incisor, lateral incisor, first molar, canine, and second molar
C. First molar, central incisor, lateral incisor, canine, and second molar
D. First molar, central incisor, lateral incisor, second molar, and canine Correct
Answer: B. Central incisor, lateral incisor, first molar, canine, and second molar
A size-30 root canal file is broken 1 mm short of the apex in the distofacial canal
of a maxillary second molar. The instrument can neither be removed nor by-
passed. The remaining pulp is vital. In this situation, the dentist should complete
the root canal treatment and
,A. amputate the distofacial root.
B. perform an apicoectomy of the distofacial root.
C. perform an apicoectomy and a retrofill of the distofacial root.
D. place the patient on recall for further evaluation. Correct Answer: D. place the
patient on recall for further evaluation.
For a complete denture balanced occlusion, the lingual cusps of maxillary posterior
teeth on the non-working side contacts which areas of the mandibular posterior
teeth?
A. The facial inclines of the lingual cusps
B. The lingual inclines of the lingual cusps
C. The lingual inclines of the facial cusps
D. The central fossae Correct Answer: C. The lingual inclines of the facial cusps
Thrombophlebitis, which occurs after intravenous administration of diazepam, is
usually attributed to which of the following substances in the mixture?
A. Benzoic acid
B. Ethyl alcohol
C. Propylene glycol
D. Sodium metabisulfite Correct Answer: C. Propylene glycol
Although no causal relationships between particular bacteria and periodontal
diseases have been determined, there does appear to be an association between
localized juvenile periodontitis and the presence of
A. Actinobacillus actinomycetemcomitans.
B. Porphyromonas gingivalis.
C. Actinomyces viscosus.
D. Treponema denticola. Correct Answer: A. Actinobacillus
actinomycetemcomitans.
When a patient opens his mouth, there is an audible click. Which of the following
represents the MOST plausible explanation?
A. The joint capsule has thickened.
B. The disk and condyle lack functional coordination.
C. The articular eminence has flattened.
, D. The medial pterygoid muscle is in spasm. Correct Answer: B. The disk and
condyle lack functional coordination.
Each of the following is a pharmacologic effect of phenothiazines EXCEPT one.
Which one is this EXCEPTION?
A. Sedation
B. An antiemetic effect
C. Alpha-adrenergic blockade
D. Potentiation of the action of narcotics
E. An anticonvulsant Correct Answer: E. An anticonvulsant
A higher than average mandibular plane angle is often associated with which of the
following?
A. A deep overbite and a vertical growth pattern
B. A deep overbite and a Class I division 2 malocclusion
C. A deep overbite and a long lower anterior face height
D. A vertical growth pattern and a Class II division 2 malocclusion
E. A vertical growth pattern and a long lower anterior face height Correct Answer:
E. A vertical growth pattern and a long lower anterior face height
The copal resin varnish that is placed in the cavity preparation before the amalgam
is condensed provides
A. sealing of the margins for the lifetime of the restoration.
B. long-term sealing of several years duration.
C. short-term sealing of the margins.
D. no sealing of the margins. Correct Answer: C. short-term sealing of the
margins.
Which condition describes a combination of steatorrhea, chronic respiratory
infections, and functional disturbances in secretory mechanisms of various glands?
A. Lead poisoning
B. Cystic fibrosis
C. Juvenile onset diabetes
D. Acquired immune deficiency syndrome Correct Answer: B. Cystic fibrosis
AND ANSWERS ALL CORRECT
The Occupational Safety and Health Administration (OSHA) is concerned with
regulated waste within the office. The Environmental Protection Agency (EPA)
regulates the transportation of waste from the office.
A. Both statements are TRUE.
B. Both statements are FALSE.
C. The first statement is TRUE, the second is FALSE.
D. The first statement is FALSE, the second is TRUE. Correct Answer: A. Both
statements are TRUE.
After the dentist has completed an etching procedure on a Class III composite
preparation, the preparation becomes contaminated with saliva. In response, the
dentist should do which of the following?
A. Blow away the saliva with air, then proceed
B. Rinse away the saliva with water, dry the preparation, then proceed
C. Wipe away the saliva with a cotton pellet, rinse the preparation with water, dry
it with air, then proceed
D. Rinse away the saliva with water, dry the preparation with air, then repeat the
etching procedure Correct Answer: D. Rinse away the saliva with water, dry the
preparation with air, then repeat the etching procedure
Which of the following eruption sequences is most commonly found in the primary
dentition?
A. Central incisor, lateral incisor, canine, first molar, and second molar
B. Central incisor, lateral incisor, first molar, canine, and second molar
C. First molar, central incisor, lateral incisor, canine, and second molar
D. First molar, central incisor, lateral incisor, second molar, and canine Correct
Answer: B. Central incisor, lateral incisor, first molar, canine, and second molar
A size-30 root canal file is broken 1 mm short of the apex in the distofacial canal
of a maxillary second molar. The instrument can neither be removed nor by-
passed. The remaining pulp is vital. In this situation, the dentist should complete
the root canal treatment and
,A. amputate the distofacial root.
B. perform an apicoectomy of the distofacial root.
C. perform an apicoectomy and a retrofill of the distofacial root.
D. place the patient on recall for further evaluation. Correct Answer: D. place the
patient on recall for further evaluation.
For a complete denture balanced occlusion, the lingual cusps of maxillary posterior
teeth on the non-working side contacts which areas of the mandibular posterior
teeth?
A. The facial inclines of the lingual cusps
B. The lingual inclines of the lingual cusps
C. The lingual inclines of the facial cusps
D. The central fossae Correct Answer: C. The lingual inclines of the facial cusps
Thrombophlebitis, which occurs after intravenous administration of diazepam, is
usually attributed to which of the following substances in the mixture?
A. Benzoic acid
B. Ethyl alcohol
C. Propylene glycol
D. Sodium metabisulfite Correct Answer: C. Propylene glycol
Although no causal relationships between particular bacteria and periodontal
diseases have been determined, there does appear to be an association between
localized juvenile periodontitis and the presence of
A. Actinobacillus actinomycetemcomitans.
B. Porphyromonas gingivalis.
C. Actinomyces viscosus.
D. Treponema denticola. Correct Answer: A. Actinobacillus
actinomycetemcomitans.
When a patient opens his mouth, there is an audible click. Which of the following
represents the MOST plausible explanation?
A. The joint capsule has thickened.
B. The disk and condyle lack functional coordination.
C. The articular eminence has flattened.
, D. The medial pterygoid muscle is in spasm. Correct Answer: B. The disk and
condyle lack functional coordination.
Each of the following is a pharmacologic effect of phenothiazines EXCEPT one.
Which one is this EXCEPTION?
A. Sedation
B. An antiemetic effect
C. Alpha-adrenergic blockade
D. Potentiation of the action of narcotics
E. An anticonvulsant Correct Answer: E. An anticonvulsant
A higher than average mandibular plane angle is often associated with which of the
following?
A. A deep overbite and a vertical growth pattern
B. A deep overbite and a Class I division 2 malocclusion
C. A deep overbite and a long lower anterior face height
D. A vertical growth pattern and a Class II division 2 malocclusion
E. A vertical growth pattern and a long lower anterior face height Correct Answer:
E. A vertical growth pattern and a long lower anterior face height
The copal resin varnish that is placed in the cavity preparation before the amalgam
is condensed provides
A. sealing of the margins for the lifetime of the restoration.
B. long-term sealing of several years duration.
C. short-term sealing of the margins.
D. no sealing of the margins. Correct Answer: C. short-term sealing of the
margins.
Which condition describes a combination of steatorrhea, chronic respiratory
infections, and functional disturbances in secretory mechanisms of various glands?
A. Lead poisoning
B. Cystic fibrosis
C. Juvenile onset diabetes
D. Acquired immune deficiency syndrome Correct Answer: B. Cystic fibrosis
