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50 Cards in this Set
- Front
- Back
An acute periapical abscess originating
from a mandibular third molar generally points and drains in the A. submandibular space. B. pterygomandibular space. C. buccal vestibule. D. buccal space. |
A. submandibular space.
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When sutures are used to reposition tissue
over extraction sites, they should be 1. placed over firm bone where possible. 2. interrupted, 15mm apart. 3. firm enough to approximate tissue flaps without blanching. 4. tight enough to produce immediate hemostasis. |
1. placed over firm bone where
possible. 3. firm enough to approximate tissue flaps without blanching. |
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What is the maximum number of
cartridges (1.8ml) of a 2 local anesthetic solution that can be administered without exceeding a total dose of 300mg? A. 2 B. 4 C. 6 D. 8 E. 10 |
D. 8
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After an inferior alveolar nerve block
injection, a patient would develop seventh nerve paralysis if the injection was made into the A. internal maxillary artery. B. retroparotid space. C. internal pterygoid muscle. D. retromandibular vein. E. pterygoid plexus of veins. |
B. retroparotid space.
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In primary molars, radiographic bony
changes from an infection are initially seen A. at the apices. B. in the furcation area. C. at the alveolar crest. D. at the base of the developing tooth. |
B. in the furcation area.
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An ankylosed deciduous molar can cause
A. delayed eruption of the succeeding premolar. B. alteration of arch length. C. difficulty with extraction. D. All of the above. |
D. All of the above.
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The eruption of a permanent central
incisor may be delayed by A. a supernumerary tooth. B. dense fibrous tissue. C. a retained deciduous incisor. D. All of the above. |
D. All of the above.
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The highest incidence of congenitally
missing lateral incisors is most likely seen in a patient with A. unilateral cleft lip and palate. B. congenital heart disease. C. Down's syndrome. D. hyperthyroidism. |
A. unilateral cleft lip and palate.
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A radiographic examination of a 10 year
old child reveals retention of deciduous teeth and presence of many unerupted supernumerary teeth. This is characteristic of A. cleidocranial dysplasia. B. ectodermal dysplasia. C. dentinogenesis imperfecta. D. congenital hypothyroidism. |
A. cleidocranial dysplasia.
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Concerning hand-wrist radiographs, which
of the following statements is correct? A. Bone age is estimated by the presence or absence of osseous centres in particular bones and compared with standards. B. Hand-wrist radiographs are a precise measure of progress in skeletal development in normal children. C. The hand-wrist radiograph is of little value in orthodontic diagnosis. D. The information obtained from radiographs alone is enough to make an accurate determination of skeletal age. |
A. Bone age is estimated by the
presence or absence of osseous centres in particular bones and compared with standards. |
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In cephalometry, the most stable point in a
growing skull is the A. sella turcica. B. nasion. C. Broadbent's point. D. Bolton point. |
A. sella turcica.
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Which of the following patients should be
referred for orthodontic treatment to close a diastema between maxillary central incisors? 1. An 8-year old with no abnormal oral habits. 2. A 14-year old with no abnormal oral habits. 3. A 3-year old with a 4mm overjet. 4. An 8-year old with a previous thumb habit. |
2. A 14-year old with no abnormal oral
habits. 4. An 8-year old with a previous thumb habit. |
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The radiographic appearance of internal
resorption is A. radiolucent enlargement of the pulp cavity. B. radiolucency around the apex of the root. C. radiolucency on the surfaces of the root. D. localized radiopacities in the pulp cavity. E. radiopacity around the apex of the root. |
A. radiolucent enlargement of the pulp
cavity. |
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Roots of the permanent maxillary central
incisors are completed by what age? A. 8 years. B. 10 years. C. 12 years. D. Later than 12 years. |
B. 10 years.
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The developing permanent tooth
A. lies apically and lingually to primary teeth in the anterior region. B. may show deviated eruption times if the primary tooth is lost prematurely. C. has a more protrusive path of eruption in the anterior region. D. All of the above. |
D. All of the above.
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An endomorph is characterized as a person
who A. is short and fat. B. is tall and thin. C. is muscular. D. matures early. E. matures late. |
A. is short and fat.
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Primate spacing in the primary dentition is
observed between 1. maxillary canines and first molars. 2. maxillary canines and lateral incisors. 3. mandibular canines and first molars. 4. mandibular canines and lateral incisors. |
2. maxillary canines and lateral incisors.
3. mandibular canines and first molars. |
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The anterior component of force may be
observed clinically as A. distal movement of a permanent mandibular cuspid. B. mesial movement of a permanent maxillary first molar. C. A. and B. D. None of the above. |
A. distal movement of a permanent
mandibular cuspid. B. mesial movement of a permanent maxillary first molar. |
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If a child's teeth do not form, the primary
effect will be on the growth of the A. alveolar bone. B. mandible. C. maxilla. D. palate. |
A. alveolar bone.
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The organisms associated with a carious
pulpitis are A. streptococci. B. staphylococci. C. spirochetes. D. viruses. |
A. streptococci.
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Mandibular growth
A. is sustained over a longer period of time in girls. B. is sustained over a longer period of time in boys. C. occurs at the same chronologic age in both sexes. D. occurs two years earlier in boys than in girls. |
B. is sustained over a longer period of
time in boys. |
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Hypothyroidism affects the dental
developmental pattern by A. interfering with jaw growth. B. delaying the eruption timetable. C. causing sclerotic bone to form over the occlusal surface of erupting teeth. D. accelerating the eruption timetable. |
B. delaying the eruption timetable.
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An overjet of 8mm is usually associated
with A. Class I cuspid relationship. B. Class II cuspid relationship. C. Class III cuspid relationship. D. Class I molar relationship. |
B. Class II cuspid relationship.
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A single tooth anterior crossbite found in a
9 year old should A. self-correct. B. be treated with a removable appliance. C. have 2 arch orthodontic treatment. D. be treated in the complete permanent dentition. E. be observed and treated when the cuspids have erupted. |
B. be treated with a removable
appliance. |
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The significant factor in the correction of
an anterior cross-bite is the A. age of patient. B. depth of cross-bite. C. shape of the tooth involved. D. space available mesiodistally. |
D. space available mesiodistally.
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In a chronic mouth breather, you would
most likely see 1. a high narrow palate. 2. a crossbite 3. a Class II malocclusion. 4. short lower face height. |
1. a high narrow palate.
2. a crossbite 3. a Class II malocclusion. |
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An 11-year old child has an open bite
caused by active thumbsucking. You would A. insert a habit-breaking appliance. B. refer to a psychologist for evaluation. C. encourage the child to accept help in discontinuing the habit and observe periodically. D. refer to an orthodontist. |
D. refer to an orthodontist.
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The treatment of a Class II, Division 1
malocclusion has the best prognosis when A. there is labial tipping of the maxillary incisors. B. there is a satisfactory relationship of maxillary and mandibular apical bases. C. there is no archlength(tooth size) discrepancy. D. There is a short lower anterior face height. E. All of the above. |
E. All of the above.
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Loops and helices in wires are used in
orthodontic appliances to provide A. a decreased force. B. a greater range of activation. C. more precise control of tooth movement. D. All of the above. |
B. a greater range of activation.
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Mandibular condylar region grows by
A. sutural and interstitial proliferation. B. interstitial and appositional proliferation. C. appositional and sutural proliferation. D. interstitial proliferation only. E. appositional proliferation only. |
B. interstitial and appositional
proliferation. |
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The roots of primary molars in the absence
of their permanent successors 1. sometimes are partially resorbed and become ankylosed. 2. may remain for years with no significant resorption. 3. may remain for years partially resorbed. 4. are always resorbed. |
1. sometimes are partially resorbed and
become ankylosed. 2. may remain for years with no significant resorption. 3. may remain for years partially resorbed. |
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A Class II dental occlusion in the mixed
dentition will likely A. develop into a Class I occlusion after normal exfoliation of the primary molars. B. worsen with forward growth of the maxilla. C. develop into a Class I occlusion with late mandibular growth. D. develop into a skeletal malocclusion with growth of the maxilla and mandible. E. not change as the maxilla and mandible grow. |
A. develop into a Class I occlusion after
normal exfoliation of the primary molars. |
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Which of the following factors is(are)
related to a malocclusion caused by thumbsucking? A. Duration. B. Frequency. C. Intensity. D. All of the above. |
D. All of the above.
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Alveolar bone is undergoing remodeling
A. through the primary dentition. B. until the end of mixed dentition. C. until the complete eruption of permanent teeth. D. throughout life. |
D. throughout life.
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Pressure and tension have little effect on
growth of A. the fronto-maxillary suture. B. the alveolus. C. the mandible. D. cartilage. |
D. cartilage.
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A single hypoplastic defect located on the
labial surface of a maxillary central incisor is most likely due to a/an A. dietary deficiency. B. endocrine deficiency. C. tetracycline therapy. D. trauma to the maxillary primary central incisor. E. high fluoride intake. |
D. trauma to the maxillary primary
central incisor. |
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The term "dental age" refers to the
A. state of dental maturation. B. eruption time of a given tooth. C. number of years elapsed since a given tooth erupted. D. None of the above. |
A. state of dental maturation.
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The best time to correct a permanent
maxillary central incisor cross-bite is A. after the canines erupt. B. after the central incisors erupt. C. after the lateral incisors erupt. D. during the eruptive stage of central incisors. |
D. during the eruptive stage of central
incisors. |
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When taking radiographs on a 10 year old
child, which of the following should be used to decrease radiation exposure? 1. A lead apron. 2. A decrease of the kilovoltage to 50kVp. 3. Use of high speed film. 4. Application of a radiation protection badge. |
1. A lead apron
.3. Use of high speed film. |
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An exchange of calcium ions between
saliva and enamel is 1. affected by fluoride. 2. a component of remineralization and demineralization. 3. important in maintenance of tooth structure. 4. pH dependent. |
E. All of the above.
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A 3 year old requires the extraction of a
deciduous maxillary second molar. The local anesthetic technique of choice is A. a posterior superior alveolar block. B. buccal and palatal infiltration. C. a tuberosity block plus subperiosteal infiltration of the mesio-buccal root. D. an infra-orbital block. |
B. buccal and palatal infiltration.
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A 9-year old boy is brought to the office
for treatment immediately following a facial injury with a fracture of enamel only of a maxillary central incisor. The tooth tests completely negative to an electric pulp tester. This finding indicates that the tooth A. is non-vital and should be extracted. B. is non-vital and endodontic therapy may save the tooth. C. probably has a root fracture and is not amenable to root canal therapy. D. may be only temporarily nonresponsive and should be checked at a later date. |
D. may be only temporarily nonresponsive
and should be checked at a later date. |
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Class II malocclusions can be prevented
by A. maintaining the integrity of the primary dentition. B. preventing thumbsucking and lip biting habits. C. correcting mouth breathing as early as possible. D. None of the above. |
D. None of the above.
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The mechanism of adjustment to maintain
the shape and proportions of bone throughout its growth period is called A. remodeling. B. cortical drift. C. area relocation. D. translatory growth. |
A. remodeling.
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Tooth development begins when the basal
layer of cells proliferates to form a ridge called the A. dental lamina. B. dental papilla. C. odontoblastic matrix. D. invaginating cap. |
A. dental lamina.
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The sequence of eruption of the
mandibular permanent teeth is normally 1. central incisor. 2. lateral incisor. 3. canine. 4. first premolar. 5. second premolar. 6. first molar. 7. second molar. |
D. (6)(1)(2)(3)(4)(5)(7)
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The most frequent cause of malocclusion
is A. thumbsucking. B. mouth breathing. C. heredity. D. ectopic eruption. |
C. heredity.
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Premature loss of mandibular deciduous
cuspids in Class I and Class II cases results in increased 1. overjet. 2. arch width. 3. overbite. 4. leeway space. |
1. overjet.
3. overbite. |
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In the mandibular dental arch of a 12-year
old boy, the permanent first molars are in contact with the first premolars and the crowns of the second premolars have erupted lingually. The likely cause is A. ankylosis of the mandibular second premolars. B. lack of space. C. teeth too large for the dental arch. D. premature loss of deciduous second molars. E. faulty lingual eruption of the second premolars. |
D. premature loss of deciduous second
molars. |
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Thumbsucking in most cases does not
cause permanent harm to the dentition if the habit is A. discontinued before four years of age. B. discontinued before eight years of age. C. practised only at night. D. is light in intensity. E. None of the above. |
A. discontinued before four years of
age. |