Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
50 Cards in this Set
- Front
- Back
Which of the following, if left untreated, is
most likely to result in a periapical lesion? A. Internal resorption. B. Reversible pulpitis. C. Acute suppurative pulpitis. D. Chronic hyperplastic pulpitis. E. Diffuse calcification of the pulp. |
C. Acute suppurative pulpitis.
|
|
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. |
|
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. |
|
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.
|
|
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.
|
|
The use of cavity varnish under an
amalgam restoration will 1. have a bactericidal effect. 2. decrease marginal leakage. 3. stimulate secondary dentine formation. 4. decrease tooth discolouration. |
2. decrease marginal leakage.
4. decrease tooth discolouration. |
|
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.
|
|
Cements used as cavity liners
A. provide a barrier to the passage of irritants from restorative materials. B. reduce sensitivity of freshly cut dentin. C. provide thermal insulation to the pulp. D. All of the above. |
D. All of the above.
|
|
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.
|
|
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.
|
|
Erratic and inconsistent electric pulp test
results can be explained by A. the presence of multiple canals in various stages of pulp pathosis. B. failure to isolate and dry the tooth. C. pulpal calcification. D. poor contact between the electrode and the tooth. E. All of the above. |
E. All of the above.
|
|
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.
|
|
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. |
|
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. |
|
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. |
|
If an impression were taken with a
mercaptan rubber base material of teeth exhibiting severe external undercuts a stone model should be poured A. immediately. B. after 30 minutes. C. after 24 hours. D. None of the above. |
B. after 30 minutes.
|
|
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.
|
|
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. |
|
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.
|
|
Prevention of gingival irritation by a major
connector of a removable partial denture is accomplished by A. using split palatal bars. B. reducing the size of the connector. C. ensuring maximum distribution of occlusal forces. D. providing relief between the connector and the gingiva. |
D. providing relief between the
connector and the gingiva. |
|
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. |
|
Following orthodontic alignment, relapse
of the mandibular incisors cannot A. be predicted from characteristics of the original malocclusion. B. occur if the second or third molars are removed. C. occur if retainers are worn until the mandibular growth is complete. D. occur if a supracrestal fiberotomy is performed. |
A. be predicted from characteristics of
the original malocclusion. |
|
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.
|
|
When uprighting a molar to be used as a
bridge abutment, consideration must be given to the A. local periodontium. B. vertical changes due to tipping of the molar. C. residual space for a pontic. D. use of fixed appliances for optimum control. E. All of the above. |
E. All of the above.
|
|
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.
|
|
Normal sulcular epithelium in man is
1. nonkeratinized. 2. squamous. 3. stratified. 4. nonpermeable. |
1. nonkeratinized.
2. squamous. 3. stratified. |
|
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.
|
|
Tachycardia is a term which describes a
pulse rate of A. less than 50. B. less than 60. C. less than 70. D. more than 70. |
D. more than 70.
|
|
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. |
|
The severity of the course of periodontal
disease depends upon the A. resistance of the host. B. virulence of the organism. C. number of organisms present. |
A. resistance of the host.
B. virulence of the organism. C. number of organisms present. |
|
Which of the following has/have
analgesic, antipyretic and antiinflammatory effects? A. Acetominophen. B. Acetylsalicylic acid. C. Bradykinin. D. A. and B. E. None of the above. |
B. Acetylsalicylic acid.
|
|
The depth of penetration of any object by
x-rays is determined by 1. milliamperage. 2. density of the object. 3. exposure time. 4. kilovoltage. |
2. density of the object.
4. kilovoltage. |
|
Increased radiographic density is caused
by A. decreased mA. B. decreased kV. C. decreased target-object distance. D. increased object-film distance. E. None of the above. |
C. decreased target-object distance.
|
|
Which of the following will increase
image sharpness on radiographs? A. Small focal spot. B. Long source-film distance. C. Short object-film distance. D. All of the above. |
D. All of the above.
|
|
Filters are placed in the path of the x-ray
beam to A. increase contrast. B. reduce film density. C. reduce exposure time. D. reduce patient radiation dose. |
D. reduce patient radiation dose.
|
|
The amount of radiation to a patient can be
reduced by 1. using a high speed film. 2. using an aluminum filter. 3. using low kVp. 4. increasing target-film distance. 5. decreasing target-film distance. |
1. using a high speed film.
2. using an aluminum filter. 4. increasing target-film distance. |
|
Which of the following modifications to
the standard procedure for mixing gypsum products will increase the compressive strength of the set material? A. Adding a small amount of salt to the water before mixing. B. Decreasing the water/powder ratio by a small amount. C. Using warmer water. D. Decreasing the mixing time. |
B. Decreasing the water/powder ratio by
a small amount. |
|
Which of the following properties apply to
glass ionomer cements? 1. Chemical bonding to etched dentin. 2. Non-irritating to pulpal tissue at moderate depth. 3. Anticariogenic because of fluoride release. |
D. All of the above.
|
|
Particulate hydroxyapatite, when placed
subperiostially, 1. is highly biocompatible. 2. has a low incidence of secondary infection following surgery. 3. has a tendency to migrate following insertion. 4. induces bone formation throughout the implanted material. |
E. All of the above.
|
|
World epidemiological data indicates that
periodontal disease is the most likely cause of tooth loss in the following age group: A. 10 - 20 years. B. 20 - 30 years. C. 30 - 50 years. D. 65 - 75 years. E. over 75 years. |
D. 65 - 75 years.
|
|
A characteristic sign of aggressive
periodontitis in an adolescent (juvenile periodontitis) is A. marginal gingivitis. B. painful, burning gingivae. C. hyperplastic gingivitis. D. drifting of the teeth. |
D. drifting of the teeth.
|
|
To ensure maximum marginal strength for
an amalgam restoration the cavosurface angle should A. approach 45 degrees. B. approach 90 degrees. C. be bevelled. D. be chamfered. |
B. approach 90 degrees.
|
|
For an acid-etched Class III composite
resin, the cavosurface margin of the cavity can be bevelled to 1. eliminate the need for internal retention. 2. improve convenience form. 3. aid in finishing. 4. increase the surface area for etching. |
4. increase the surface area for etching.
|
|
Planing the enamel at the gingival
cavosurface of a Class II amalgam preparation on a permanent tooth A. should result in a long bevel. B. is contraindicated because of the low edge strength of amalgam. C. is unnecessary since the tooth structure in this area is strong. D. should remove unsupported enamel which may fracture. E. should result in a sharp gingivoproximal line angle. |
D. should remove unsupported enamel
which may fracture. |
|
The area of the tooth that is most sensitive
during cavity preparation is A. dentin. B. cementum. C. cementoenamel junction. D. dentinoenamel junction. |
D. dentinoenamel junction.
|
|
Which of the following clinical findings
will give the most favourable prognosis for successful direct pulp capping? 1. No hemorrhage at the exposure site. 2. The exposure is small. 3. The tooth is hypersensitive to heat. 4. The exposure site is uncontaminated. |
2. The exposure is small
4. The exposure site is uncontaminated. |
|
Which of the following is/are (a) useful
guide(s) in determining a patient’s occlusal vertical dimension? 1. Appearance. 2. Phonetics. 3. Observation of the rest position. 4. Pre-extraction profile records. |
E. All of the above.
|
|
In taking an interocclusal wax record in a
protrusive position, the dentist should examine the wax record to insure that A. the incisal edges of the anterior teeth have made contact. B. the patient has not closed in a lateral position. C. all cusps have penetrated the wax record and are in contact with the opposing teeth. D. there is no perforation of the wax record. |
B. the patient has not closed in a lateral
position. |
|
Reduction of free-way space in complete
denture construction will 1. impair aesthetics. 2. cause the dentures to click. 3. traumatize the underlying supporting tissues. 4. induce generalized soreness over the ridges. |
E. All of the above.
|
|
The retention form of a full crown
preparation can be improved by 1. reducing its taper. 2. increasing its length. 3. utilizing grooves or boxes. 4. polishing the preparation. |
1. reducing its taper.
2. increasing its length. 3. utilizing grooves or boxes. |