NBDE 1988 Tooth Anatomy, Pathology, Dental Occlusion, Microbiology

Which of the following laboratory results is diagnostic of acute pancreatitis?
A) Elevated alkaline phosphatase.
B) Decreased albumin
C) Decreased serum amylase
D) Elevated serum lipase

A complication of peptic ulcer disease that accounts for the majority of deaths is
A) surgical complication.
B) bleeding.
C) perforation.
D) malignant transformation.
E) obstruction from edema or scarring.

A cross section at midroot of a permanent mandibular central incisor is likely to show that the pulp cavity is
A) divided into two canals.
B) flattened faciolingually.
C) almost round.
D) flattened mesiodistally.
E) shaped much the same as that of a maxillary central incisor.

Which of the following permanent teeth has its mesial marginal ridge located more cervically than its distal marginal ridge?
A) Mandibular first molar
B) Mandibular first premolar
C) Maxillary first molar
D) Maxillary second premolar
E) Mandibular second premolar
F) Mandibular second molar

In a normal, healthy mouth, the interdental papilla that is the shortest cervicoincisally (cervico-occlusally) is between mandibular
A) canine and first premolar.
B) central incisors.
C) central and lateral incisors.
D) lateral incisor and canine.
E) second premolar and first molar.
F) first and second premolars.

A patient with which of the following diseases is least likely to show "clubbing" of fingers and cyanotic nail beds?
A) Congestive heart failure
B) Chronic pulmonary disease
C) Polycythemia
D) Systemic lupus erythematosus.
E) Congenital heart disease

In the intercuspal position, the cusp tip of the permanent maxillary canine is in direct alignment with which anatomic feature of the mandibular teeth?
A) Interproximal space
B) Facial embrasure
C) Distal ridge of the cusp of the mandibular canine
D) Mesial ridge of the facial cusp of the mandibular first premolar
E) Incisal embrasure

Pronounced developmental grooves are usually associated with embrasures between permanent:
(a) maxillary central and lateral incisors; (b) maxillary lateral incisors and canines; (c) maxillary canines and first premolars; (d) maxillary first and second premolars; (e) mandibular canines and first premolars; (f) mandibular first and second premolars; (g) mandibular second premolars and first molars; (h) mandibular first and second molars.
A) (c) onlyB) (d) onlyC) (g) onlyD) (b) onlyE) (d) and (f)F) (a) onlyG) (c) and (e)

The drawing is a cross section at the cervical line of what permanent tooth?
A) Maxillary lateral incisor
B) Mandibular first premolar
C) Mandibular canine
D) Mandibular central incisor

A primary mandibular second molar differs from a permanent mandibular first molar in that a primary mandibular second molar
A) is darker in color.
B) has a larger occlusal surface.
C) is larger in size.
D) has a form peculiar to itself.
E) has roots that are more divergent.

The most common cause of a massive hematemesis in alcoholics is
A) acute hemorrhagic pancreatitis.
B) peptic ulcer.
C) acute gastritis.
D) esophageal varices.
E) Mallory-Weiss syndrome.

Viewed anteriorly, which diagram represents a chewing stroke?

The sketch represents the
A) distal view of a permanent mandibular second molar
B) distal view of a permanent mandibular first molar.
C) mesial view of a permanent mandibular third molar.
.D) mesial view of a permanent mandibular first molar.
E) mesial view of a permanent mandibular second molar.

In an ideal intercuspal position, the distolingual cusp of a permanent maxillary first molar opposes the
A) lingual sulcus of the mandibular first molar.
B) mesial marginal ridge area of the mandibular second molar.
C) facial embrasure between mandibular first and second molars.
D) mesial fossa of the mandibular second molar.
E) central fossa of the mandibular first molar.

Bacteria of which of the following genera have a limited range of habitats in the oral cavity ?
(a) Treponema; (b) Bacteroides; (c) Actinomyces (d) Streptococcus

Features of the herpes simplex virus type 1 virion surface include
A) an envelope synthesized de novo.
B) none of the above.
C) an envelope acquired by budding through the nuclear membrane.
D) no envelope.
E) an envelope acquired by budding through the cytoplasmic membrane.

Assuming occlusion and alignment are normal, the arrows on the sketch represent the path taken by the
A) cusp of canine and facial cusp of first premolar.
B) lingual cusp of second premolar and the mesiolingual cusp of first molar.
C) facial cusps of premolars.
D) lingual cusps of premolars.
E) facial cusp of second premolar and the mesiofacial cusp of first molar.

In which of the following areas is the alveolar process the thinnest?
A) Lingual to the maxillary central incisors
B) Lingual to the maxillary canines
C) Lingual to the mandibular first molars
D) Facial to the maxillary second molars
E) Facial to the mandibular central incisors
F) Lingual to the maxillary second molars

The protrusive pathway of mandibular cusps on maxillary posterior teeth is toward the
A) lingual.B) None of the above C) mesial.D) distal.E) facial.

In the intercuspal position, which of the following anterior teeth has the potential to contact both anterior and posterior antagonists?
A) Mandibular canine
B) Mandibular lateral incisor
C) Maxillary canine
D) Maxillary lateral incisor

Phage conversion is responsible for
A) transduction of bacteria.
B) production of B-galactosidase
C) antigenic phase variation.
D) production of erythrogenic toxin by Streptococcus pyogenes.
E) ability of Rhizobium species to fix nitrogen.

Calcification of the roots of the primary dentition is normally completed at what age?
A) 7-8 years
B) 5-6 years
C) None of the above
D) 3-4 years
E) 1-2 years

Which of the following permanent teeth is least likely to have a divided pulp canal?
A) Mandibular lateral incisor
B) Maxillary first premolar
C) Mandibular first premolar
D) Mandibular central incisor
E) Maxillary central incisor

Generally, the antibiotic of choice for prophylactic therapy covering dental procedures in a patient with a heart valve abnormality who is allergic to penicillin
is

A) ampicillin.
B) lincomycin.
C) streptomycin.
D) erythromycin.
E) tetracycline.

Most rickettsial diseases produce severe illness in humans because rickettsiae
A) produce potent exotoxins.
B) are primarily neurotropic and cause extensive damage in certain CNS centers.
C) are particularly destructive to cutaneous tissues.
D) are destructive for endothelial cells.

In the mandibular arch, the greatest lingual inclination of the crown from its root is seen in a permanent
A) lateral incisor.B) canine.C) central incisor.D) third molar.E) first premolar.

The most acceptable conditions for complete sterilization by autoclaving are
A) 15 minutes at 275° F. (135° C.) and 10 lbs. of pressure.
B) 5 minutes at 275° F. (135° C.) and 15 lbs. of pressure.
C) 20 minutes at 250° F (121° C) and 15 lbs. of pressure.
D) 20 minutes at 250° F. (121° C.) and 10 lbs. of pressure.

In an ideal intercuspal position, a permanent mandibular lateral incisor opposes the:
(a) distal marginal ridge of a maxillary central incisor;
(b) mesial marginal ridge of a maxillary lateral incisor;
(c) distal marginal ridge of a maxillary lateral incisor;
(d) mesial marginal ridge of a maxillary canine;
(e) maxillary lateral incisor 2-3 mm. cervically to the incisal edge;
(f) maxillary lateral incisor at the incisal edge.
A) (c), (d) and (e) B) (a), (b) and (f)C) (a) and (b) onlyD) (a), (b) and (e)E) (b) only

The lingual cusp of a mandibular first premolar contacts the
A) mesial incline plane of the lingual cusp of a first premolar
.B) mesial marginal ridge of a maxillary first premolar.
C) cingulum of a maxillary canine.
D) None of the above
E) lingual embrasures of a maxillary canine and a maxillary first premolar.

Which of the following is characterized by a collapse of alveoli?

A) Emphysema
B) Pneumonia
C) Empyema
D) Bronchiectasis.
E) Atelectasis

Infants are routinely immunized against diseases caused by:
(a) Brucella abortus; (b) Bordetella pertussis; (c) Corynebacterium diphtheriae; (d) Clostridium tetani; (e) Hemophilus influenzae.

A) (b), (c) and (d)B) (b), (d) and (e)C) (c), (d) and (e).D) (a), (b) and (c)E) (a), (c) and (e)

The primary function of the dental pulp is to
A) protect the periodontium.
B) provide sensation.
C) assure root-end closure.
D) form dentin.
E) provide nutrition.

Hepatitis B

1. Anti-HBs and HBs-antigen
2. Anti-HBc and Anti-HBs
3. Anti-HBs no Anti-HBc

window period- have Anti-HBc but not Anti-HBs

In cases of delayed resorption of primary incisors, the permanent incisors may be expected to erupt
A) facial to the normal arch form
B) lingual to the normal arch form.
C) distal to the normal arch position.
D) mesial to the normal arch position.

Which of the following teeth is most likely to resist caries?
A) Mandibular first premolar
B) Maxillary lateral incisor
C) Maxillary central incisor
D) Mandibular canine

Based upon morphology, a mesio-occlusal (Class II) cavity preparation would be most difficult in which of the following teeth?
A) Permanent mandibular first molar
B) Primary mandibular first molar
C) Permanent maxillary second molar
D) Primary mandibular second molar

The roots of mandibular first premolars are :
(a) flattened faciolingually;
(b) broader facially than lingually;
(c) frequently sharply curved distally;
(d) usually free of marked distal curvature;
(e) frequently seen with slight concave areas on mesial and distal surfaces.

In healing of a fracture, which of the following will prevent favorable reconstruction and alignment of bone ? (a) Formation of pseudoarthrosis;
(b) Functional remodeling of the procallus by osteoblasts and osteoclasts;
(c) Formation of new bone at the site of fracture;
(d) Presence of sequestrum;
(e) Organization of a hematoma at the site of fracture