Andy's Dental Anatomy Questions

1. A maxillary first premolar has a 5 mm pocket around the entire tooth. During instrumentation, longitudinal developmental grooves would probably be noted on which of the following root surfaces?
1. Lingual
2. Mesial
3. Facial
4. Palatal
A single tooth experiencing premature contact when occluding is probably in
1. torsoversion
2. infraversion
3. linguoversion
4. supraversion
Which of the following occlusal factors is determined when guiding the mandible into centric relation closure?
1. canine rise
2. degree of overbite
3. centric prematurity
4. working interference
5. Balancing interference
Which of the following tooth relationships should be evaluated to determine occlusal harmony of the dentition?
(a) overlap
(b) interarch
(c) intra-arch
(d) cusp-to-fossa
1. (a), (b) and (c)
2. (a), (b) and (d)
3. (a), (c) and (d)
4. (b), (c) and (d)
5. all of the above
In centric occlusion, the normal relation of the permanent maxillary first molar to the mandibular arch is established when the
1. maxillary first molar occludes with mandibular second premolar and first molar.
2. Distal surface of the maxillary first molar is in the same plane as the distal surface of the mandibular first molar.
3. Distofacial cusp of the maxillary first molar falls in the same plane as the distal surface of the mandibular first molar.
4. Mesiolingual cusp of the maxillary first molar falls in the central fossa of the mandibular first molar.
Which of the following generally result from parafunctional occlusal habits?
(a) wear facets
(b) uneven wear patterns
(c) mobile teeth
(d) gingivitis
(e) periodontal pockets
1. (a), (b) and (c)
2. (a), (b) and (e)
3. (b), (c) and (d)
4. (b), (c) and (e)
5. (c), (d) and (e)
6. (d) and (e) only
7. all of the above
Dental fluorosis is characterized by
1. dark brown staining
2. white opaque areas of enamel
3. pitting of the enamel surface
4. all of the above
Functions of the dental papillae and the dental pulp include
(a) dentin formation
(b) influencing ameloblastic activity
(c) providing nerve and blood supply in teeth
(d) cementum formation
1. (a), (b) and (c)
2. (a), (b) and (d)
3. (a), (c) and (d)
4. (b), (c) and (d)
5. all of the above
Proper techniques for electric pulp testing includes placing the electrode on
(a) sound tooth structure
(b) teeth with full castings
(c) teeth that have been dried
(d) the occlusal third of crowns
1. (a) and (b)
2. (a) and (c)
3. (a) and (d)
4. (b) and (c)
5. (b) and (d)
6. (c) and (d)
10. Which of the following may cause dentin to become exposed?
(a) erosion
(b) root planing
(c) dental caries
(d) toothbrush abrasion
1. (a) and (b)
  5. (b) and (d)
  6. (c) and (d)
  7. all of the above
2. (a) and (c)
3. (a) and (d)
4. (b) and (c)
5. (b) and (d)
6. (c) and (d)
7. all of the above
Hard, smooth, spherical structures attached to root surfaces of permanent molars near their cervical lines are most likely
1. denticles
2. cementicles
3. enamel pearls
4. bony exostoses
5. retained primary root fragments
Which of the fllowing areas are most difficult to root plane thoroughly?
1. trifurcations of maxillary first molars
2. mesial surfaces of maxillary premolars
3. distal surfaces of mandibular third molars
4. proximal surfaces of mandibular anterior teeth
Which of the following parts of a root has the thickest layer of cementum?
1. Exposed root surface
2. Apical third of the root
3. Middle third of the root
4. Coronal third of the root
5. None of the above. Cementum is of equal thickness on all areas of the root
Calculus at the cementoenamel junction (CEJ) is difficult to discriminate because
1. pockets are usually deep at the CEJ
2. broad contacts at the CEJ prevent access
3. calculus is granular at the CEJ
4. root surfaces are convex at the CEJ
5. anatomic characteristics of the CEJ vary
The bottom of the gingival sulcus in a healthy mouth is positioned apical to the cementoenamel junction. When is this condition most likely to occur?
1. prenatally
2. at 10-20 years of age
3. at 40-60 years of age
4. just after a permanent tooth has erupted
5. before the roots of primary teeth are resorbed
Which of the following is a normal pattern for eruption of primary teeth?
1. maxillary central incisors erupt before mandibular central incisors
2. maxillary canines erupt before maxillary lateral incisors
3. maxillary first molars erupt before maxillary canines
4. mandibular canines erupt before mandibular first molars
5. mandibular second molars erupt before mandibular first molars
Which of the following might result from parents’ lack of knowledge of eruption patterns and of differences between permanent and primary teeth?
1. A 4-year-old child with no primate spaces
2. A 6-year-old child with rampant caries
3. An 8-year-old child with missing permanent first molars
4. A 10-year-old with crowding of mandibular incisors
5. A 12-year-old with unerupted permanent second molars
Facial surfaces of maxillary molars are considered food-retentive areas because
1. these areas are less self-cleaning
2. Stensen’s duct opens just opposite the molars.
3. Erupted third molars tighten contact areas
4. At rest, the lips force saliva against the molars
5. The tongue pushes food against the molars during mastication
The roots of which of the following premolars present the greatest difficulty in endodontic therapy?
1. maxillary first
2. maxillary second
3. mandibular first
4. mandibular second
Which of the following factors affect shape and size of pulp canals?
(a) age
(b) trauma
(c) attrition
(d) function
1. (a) and (b)
2. (a) and (c)
3. (a) and (d)
4. (b) and (d)
5. all of the above
Root sensitivity is overcome or reduced when the tooth reacts by formation of
1. cementum
2. hypercementosis
3. dentinal tubules
4. reparative dentin
5. a thickened periodontal ligament
Sensation of pain in the cervical area of a tooth often occurs when gingival recession takes place. The reason for such hypersensitivity is that
1. exposed cementum, like exposed bone, is highly sensitive
2. the primary dentin underwent sclerosis due to increased activity of odontoblasts
3. dentinal tubules are not adequately protected
4. dentinal tubules beneath the area of cementum exposure are increased in number
Pits in the occlusal surfaces of molars and premolars are generally found at the junctions
1. marginal ridges and inclined planes
2. inclined planes and cusp tips
3. facial and mesial surfaces
4. developmental grooves
Which of the following premolars is most likely to have two separate roots?
1. maxillary first
2. maxillary second
3. mandibular first
4. mandibular second
Which of the following occurs in the dentin as a defense against invasion of the tubules by bacteria?
1. sclerosis of the tubules
2. swelling of the tubule walls
3. decalcification of the tubules
4. proliferation of the odontoblasts
Which of the following teeth most frequently manifests dens in dente?
1. maxillary central incisor
2. maxillary lateral incisor
3. maxillary third molar
4. mandibular second premolar
5. mandibular third molar
Which of the following transmits the sensation of contact when teeth are occluding?
1. dental pulp
2. periosteum
3. alveolar bone
4. attached gingiva
5. periodontal ligament
Application of excessive heat to a tooth results in pain because
1. all stimuli to the pulp result in a pain sensation
2. excessive stimulation of a heat receptor always results in pain
3. heat receptors in the pulp have a low threshold to pain
4. blood vessels of the pulp expand and cause strangulation of the tissue
Primary molars differ from permanent molars in the primary molars have
1. less bulbous crowns
2. more pits and fissures
3. greater divergence of roots
4. none of the above
Calculus at the cementoenamel junction is difficult to discriminate because in this are
1. calculus is granular
2. root surfaces are convex
3. pockets are usually deep
4. broad contacts prevent access
5. anatomic characeteristics vary
6. both (1) and (5) above
7. both (2) and (4) above
Which type of papillae is characterized by heavy keratinization and absence of taste buds?
1. foliate
2. filiform
3. fungiform
4. circumvallate
Which of the following portions of the periodontium is least affected by traumatic occlusal forces?
1. cementum
2. gingival attachment
3. apical area of the periodontal ligament
4. oblique fibers of the periodontal ligament
All of the following are associated with occlusal trauma EXCEPT
1. loss of alveolar bone
2. increase in tooth mobility
3. formation of periodontal pockets
4. increase in width of the periodontal ligament space
1. A child has a maxillary incisor protrusion, and anterior openbite, crowded lower anteriors, and a high-palatal vault. Which of the following MOST likely caused this condition?
1. Thumbsucking
2. Mouth breathing
3. Tongue thrushing
4. Using a pacifier
5. Nocturnal bruxism
Each of the following could account for a false-negative response to an electrical pulp test EXCEPT one. Which one is the exception?
1. a tooth being immature
2. failure to use a conductive paste
3. the operator wearing surgical gloves
4. the patients being apprehensive about the test
5. the patient being premedicated with an analgesic
Which of the following permanent premolars frequently lacks a transverse ridge?
1. maxillary first
2. mandibular second
3. mandibular first
4. maxillary second
The mechanism of pain production that occurs when a hypertonic sucrose solution is applied to a tooth is most probably related to
1. dehydration of dental matrix protein
2. coagulation of dentinal matrix protein
3. movement of water out of dentinal tubules
4. piezoelectric effects on hydroxyapatite crystals
Which type of foliate papillae is most numerous on the human tongue?
1. foliate
2. filiform
3. fungiform
4. circumvallate
Which of the following parts of a root has the thickest layer of cementum?
1. Exposed root surface
2. Apical third of the root
3. Middle third of the root
4. Coronal third of the root
5. None of the above. Cementum is of equal thickness on all areas of the root
Of the following, the root depression that often can be instrumented from the lingual aspect only is on the mesial of a
1. maxillary molar
2. mandibular molar
3. maxillary premolar
4. mandibular premolar
The dental tissue that most closely resembles bone is
1. pulp
2. dentin
3. enamel
4. cementum
Which of the following may cause food impaction or retention?
(a) defective contact points
(b) unrestored carious lesions
(c) aberrant swallowing patterns
(d) discrepancies in marginal ridge height
1. (a), (b) and (c)
2. (a), (b), and (d)
3. (a), (c) and (d)
4. (a) and (d) only
5. (b) and (c) only
6. (c) and (d) only
When examining permanent teeth in intercuspal position, which of the following relations are noted for a patient with normal occlusion?
(a) each tooth occludes with two opposing teeth
(b) the maxillary arch is larger than the mandibular arch, producing acceptable horizontal overlap
(c) mandibular posterior teeth are anterior to maxillary posterior teeth
(d) interproximal spaces in maxillary and mandibular arches coincide only at midline
1. (a), (b) and (c)
2. (a), (b) and (d)
3. (b), (c) and (d)
4. (c) and (d) only
5. all of the above
Which of the following may contribute to food impaction?
(a) open contacts
(b) hyperplastic enamel
(c) unrestored carious lesions
(d) discrepencies in marginal ridge height
1. (a), (b) and (c)
2. (a), (b) and (d)
3. (a) and (c) only
4. (a), (c) and (d)
5. (b), (c) and (d)
When examining permanent teeth in intercuspal position, which of the following relations are noted for a patient with normal occlusion?
(a) each tooth occludes with two opposing teeth
(b) the maxillary arch is larger than the mandibular arch, producing acceptable horizontal overlap
(c) mandibular posterior teeth are anterior to maxillary posterior teeth
(d) interproximal spaces in maxillary and mandibular arches coincide only at midline
1. (a), (b) and (c)
2. (a), (b) and (d)
3. (b), (c) and (d)
4. (c) and (d) only
5. all of the above
Lateral (accessory) pulp canals extend
1. vertically toward the cementum
2. between two pulp canals, as a bridge
3. from the chamber, parallel to another canal
4. from pulp tissue to the periodontal ligament
The gingiva of the facial aspect of maxillary anterior teeth of an 11-year-old patient is red, edematous and bleeds easily. The affected area is widest in the midline and tapers laterally. The remaining gingiva is normal. This condition is most likely due to
1. occlusal trauma
2. mouth breathing
3. puberty hyperplasia
4. vitamin C deficiency
5. allergy to a dentrifice
6. self-inflicted gingival trauma
Which of the following premolars often has three cusps?
1. maxillary first
2. maxillary second
3. mandibular first
4. mandibular second
Application of excessive heat to a tooth results in pain because
1. all stimuli to the pulp result in a pain sensation
2. excessive stimulation of a heat receptor always results in pain
3. heat receptors in the pulp have a low threshold to pain
4. blood vessels of the pulp expand and cause strangulation of the tissue
A hard, dark brown or black spot on the clinical crown of a tooth of a 60-year-old person is most likely
1. arrested caries
2. melanin deposition in tooth structure
3. mercury from amalgam placement staining the tooth
4. hemorrhage and subsequent degradation of the blood clot
Which of the following types of ridges is unique to permanent maxillary molars?
1. cuspal
2. oblique
3. transverse
4. triangular

Andy's Dental Anatomy Questions

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