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50 Cards in this Set
- Front
- Back
Biologic damage produced by ionizing
radiation results from A. interference with mitotic activity of cells. B. direct interactions. C. free radicals. D. All of the above. |
D. All of the above.
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In X-ray equipment, kilovoltage controls
1. contrast. 2. speed of electrons. 3. amount of radiation produced. 4. penetrating power of radiation. 5. temperature of the cathode filament. |
1. contrast.
2. speed of electrons. 4. penetrating power of radiation. |
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Which of the following should be done
prior to pin hole placement in an extensive amalgam preparation? 1. Examine the radiograph. 2. Determine the subgingival anatomic contours. 3. Remove caries and unsupported enamel. 4. Place a pilot hole at the dentinoenamel junction. |
1. Examine the radiograph.
2. Determine the subgingival anatomic contours. 3. Remove caries and unsupported enamel. |
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Cytologic examination may aid in the
diagnosis of 1. Herpes simplex. 2. Recurrent aphthae. 3. Pemphigus vulgaris. 4. Erosive lichen planus. 5. Carcinoma in situ. |
1. Herpes simplex.
3. Pemphigus vulgaris. 4. Erosive lichen planus. |
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A patient has a smooth, red, protruding
lesion at the tip of the tongue. Microscopic examination reveals a stratified squamous epithelium covering loose, fibrous connective tissue with many thin-walled, vascular spaces. The diagnosis is A. fibroma. B. papilloma. C. hemangioma. D. pleomorphic adenoma. E. granular cell tumor (myoblastoma). |
C. hemangioma.
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Using pins to retain amalgam restorations
increases the risk of 1. cracks in the teeth. 2. pulp exposures. 3. thermal sensitivity. 4. periodontal ligament invasion. |
E. All of the above.
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In pin-retained restorations, the pin holes
should be parallel to the A. long axis of the tooth. B. nearest external surface. C. pulp chamber. D. axial wall. |
B. nearest external surface.
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What is the most important factor to
consider when deciding whether or not to use pulp protection? A. depth of the pulpal floor. B. thickness of the remaining dentin. C. amount of carious material removed. D. location of the carious lesion. |
B. thickness of the remaining dentin.
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Enlargement of the thyroid gland can be
caused by A. insufficient fluoride. B. excess iodine. C. insufficient iodine. D. excess calcium. E. excess sodium. |
C. insufficient iodine.
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The principal reason for a cavosurface
bevel on an inlay preparation is to A. remove undermined enamel. B. improve marginal adaptation. C. decrease marginal percolation. D. increase resistance and retention forms. |
B. improve marginal adaptation.
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Which of the following conditions is
characterized by abnormally large pulp chambers? A. Amelogenesis imperfecta. B. Regional odontodysplasia. C. Dentinogenesis imperfecta. D. Dentinal dysplasia Type I. |
B. Regional odontodysplasia.
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A positive pulp response to the application
of cold indicates A. necrosis. B. periodontal involvement. C. an acute alveolar abscess. D. a periodontal abscess. E. vitality. |
E. vitality.
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Which of the following has the highest
rate of recurrence? A. Odontogenic keratocyst. B. Nasoalveolar cyst. C. Median palatal cyst. D. Incisive canal cyst. |
A. Odontogenic keratocyst.
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Which of the following tumors may arise
in the parotid salivary gland? 1. Mixed tumor. 2. Adenocarcinoma. 3. Warthin's tumor. 4. Mucoepidermoid tumor. |
E. All of the above.
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Which of the following is the most
frequent cause of ankylosis of the temporomandibular joint? A. Intra-articular injection of steroids. B. Chronic subluxation. C. Trauma. D. Anterior disc dislocation |
C. Trauma.
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The most likely origin of a metastic
carcinoma of the mandible is a primary lesion of the 1. lung. 2. breast. 3. prostate. 4. nasopharynx. |
1. lung.
2. breast. 3. prostate |
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Which of the following is/are
characterized by an obliteration of pulp chambers and root canals? 1. Ageing. 2. Chronic trauma. 3. Dentinal dysplasia. 4. Taurodontism. |
1. Ageing.
2. Chronic trauma. 3. Dentinal dysplasia. |
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Hyperplastic lingual tonsils may resemble
which of the following? A. Epulis fissuratum. B. Lingual varicosities. C. Squamous cell carcinoma. D. Median rhomboid glossitis. E. Prominent fungiform papillae. |
C. Squamous cell carcinoma.
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In the bisecting angle principle of intraoral
radiography, the radiopacity that can obliterate the apices of maxillary molars is the A. maxillary sinus. B. palatine bone and the zygoma. C. orbital process of the zygomatic bone. D. zygoma and the zygomatic process of the maxilla. |
D. zygoma and the zygomatic process of
the maxilla. |
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Radiographically, the lamina dura is a
A. thick layer of bone forming the inner surface of the alveolus. B. thin radiolucent line around the roots of the teeth. C. thick layer of cortical bone. D. thin radiopaque line around the roots of the teeth. |
D. thin radiopaque line around the roots
of the teeth. |
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A 60-year old patient requests the
replacement of tooth 4.6, which was extracted many years ago. Tooth 1.6 has extruded 1.8mm into the space of the missing tooth. The three unit fixed bridge replacing the mandibular first molar should be fabricated A. to the existing occlusion. B. after extracting tooth 1.6 and replacing it with a fixed partial denture. C. after restoring tooth 1.6 to a more normal plane of occlusion. D. after devitalizing and preparing tooth 1.6 for a cast crown. |
C. after restoring tooth 1.6 to a more
normal plane of occlusion. |
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A tilted molar can be used as a fixed
partial denture abutment if 1. it undergoes orthodontic uprighting first. 2. a coping and telescopic crown are used on the abutment. 3. a non-rigid connector is placed in the fixed partial denture. 4. its long axis is within 25° of the long axis of the other abutments. |
E. All of the above.
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The anatomical landmarks used to help
establish the location of the posterior palatal seal of a maxillary complete denture include the A. pterygomaxillary notches and the fovea palatinae. B. pterygomaxillary notches and the posterior nasal spine. C. posterior border of the tuberosities and the posterior border of the palatine bone. D. anterior border of the tuberosities, the palatine raphe and the posterior border of the palatine bone. |
C. posterior border of the tuberosities
and the posterior border of the palatine bone. |
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Gingivitis is characterized by
A. bleeding on gentle probing of the gingival sulcus. B. swollen marginal gingiva. C. alveolar bone loss. D. apical migration of the junctional epithelium |
A. bleeding on gentle probing of the
gingival sulcus. B. swollen marginal gingiva. |
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Which of the following is/are clinical
signs of gingivitis? 1. Loss of stippling. 2. Gingival hyperplasia. 3. Bleeding on probing. 4. Increased probing depth. |
1. Loss of stippling.
2. Gingival hyperplasia. 3. Bleeding on probing. |
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Irreversible hydrocolloid materials are best
removed from the mouth by A. a quick snap. B. a slow teasing motion. C. twisting and rocking. D. having the patient create a positive pressure. |
A. a quick snap.
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To improve denture stability, mandibular
molar teeth should normally be placed A. over the crest of the mandibular ridge. B. buccal to the crest of the mandibular ridge. C. over the buccal shelf area. D. lingual to the crest of the mandibular ridge. |
B. buccal to the crest of the mandibular
ridge. |
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Dislodgement of a maxillary denture may
be caused by A. underextension. B. improper occlusion. C. overextension. D. All of the above. |
D. All of the above.
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Upon setting, a mixture of plaster of Paris
and water will exhibit A. loss in compressive strength. B. expansion. C. gain in moisture content. D. contraction. |
B. expansion.
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High copper amalgam alloys are superior
to conventional alloys in that they have 1. lower creep. 2. less corrosion. 3. less marginal breakdown. 4. higher 1 hour compressive strength. |
E. All of the above.
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Extreme resorption of an edentulous
mandible can bring the alveolar ridge to the level of the attachment of the A. buccinator, styloglossus and geniohyoid muscles. B. mylohyoid, buccinator and styloglossus muscles. C. superior constrictor, mylohyoid and buccinator muscles. D. mylohyoid, buccinator and genioglossus muscles. |
D. mylohyoid, buccinator and
genioglossus muscles. |
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Subgingival calculus differs from
supragingival calculus in that it A. does not have a definite predelection for a specific site or sites. B. may form only after the adjacent gingiva has become inflamed. C. may take longer to form. D. All of the above. |
D. All of the above.
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Habitual thumbsucking continued after the
age of six causes A. anterior open bite. B. skeletal malocclusion. C. mouth breathing. D. sinusitis. |
A. anterior open bite.
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Problems arising from impacted teeth
include A. infection. B. pain. C. predisposition to fracture. D. All of the above. |
D. All of the above.
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In the maxilla, which of the following
teeth may drain through the palatal plate of bone and present as a palatal abscess? 1. Second incisors. 2. First premolars. 3. First molars. 4. First incisors. 5. Third molars. |
1. Second incisors.
3. First molars. |
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The absence of a pulp chamber in a
deciduous maxillary incisor is most likely due to A. amelogenesis imperfecta. B. hypophosphatasia. C. trauma. D. ectodermal dysplasia. E. cleidocranial dysostosis. |
C. trauma.
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Permanent first molars begin calcification
at A. 1 to 4 months in utero. B. birth. C. 3 to 6 months. D. 7 to 11 months. E. 12 to 15 months. |
B. birth.
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In patients with cleft palates there may be
A. an increase in supernumerary teeth. B. an increase in congenitally missing teeth. C. a higher incidence of crown defects. D. All of the above. |
D. All of the above.
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Which of the following will produce
hemostasis when applied topically? A. Oxidized cellulose. B. Absorbable gelatin sponge. C. Microfibrillar collagen. D. Topical bovine thrombin. E. All of the above. |
E. All of the above.
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Which of the following drugs is(are) used
to suppress pain? 1. Benzodiazepines. 2. Barbiturates. 3. Narcotic analgesics. |
3. Narcotic analgesics.
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Before performing surgery on a patient
who is taking warfarin, which of the following should be evaluated? A. Bleeding time. B. Clotting time. C. Prothrombin time. D. Coagulation time |
C. Prothrombin time.
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Which of the following statements is
correct? A. Epithelial cells are united to the basal lamina by hemidesmosomes. B. The basal lamina is divided into lamina lucida and lamina densa. C. The basal lamina is a product of epithelial cells. D. All of the above. |
D. All of the above.
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Normal sulcular epithelium in man is
1. nonkeratinized. 2. squamous. 3. stratified. 4. nonpermeable. |
1. nonkeratinized.
2. squamous. 3. stratified. |
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The arrangement and character of the
principal fibres of the periodontal ligament are modified by A. tooth morphology. B. occlusal function. C. cementum. D. alveolar bone. |
B. occlusal function.
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Hypoglycemia is characterized by
1. mental confusion. 2. tachycardia. 3. sweating. 4. nausea. |
E. All of the above.
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Juvenile periodontitis
A. is associated with gram-negative anaerobic flora. B. is associated with gram-positive anaerobic flora. C. is associated with root caries. D. has a definite predilection toward males. |
A. is associated with gram-negative
anaerobic flora. |
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Gingival inflammation may result from
A. trauma. B. chemical irritation. C. plaque. D. All of the above. |
D. All of the above.
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Endotoxin is
A. a cell wall component of gramnegative bacteria. B. a potent inflammatory agent. C. present in diseased root cementum. D. All of the above. |
D. All of the above.
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A 70-year old female has consumed
optimal levels of fluorides all her life. You would expect to find a decreased incidence of 1. Paget's disease of bone. 2. osteoporosis. 3. hyperparathyroidism. 4. dental caries. |
2. osteoporosis.
4. dental caries. |
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The lowest level of fluoride in drinking
water which will cause enamel mottling is A. 0.5ppm. B. 1.0ppm. C. 3.0ppm. D. 5.0ppm. |
B. 1.0ppm.
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