hi guys, thanks dentist2013 for answering, well i have more qc maybe you can give me a hand.
Lack of ramus height is caused by faulty development of
A. membranous bone.
B. endochondral bone.
C. Meckels cartilage.
D. temporomandibular joint
my ans b( my rationale is that condyle grows upward and backward which is controlled by endocondreal growth,so if condyle growth that way the entire mandibule go downward and forward developping the ramus) please discuss
Odontoblast gap junctions
A. adhere the cells to one another.
B. attach the cells to the basement membrane.
C. seal off the dentin from the pulp.
D. permit lateral cell-cell communication.
my ans D9(i doubt with A ,B could not be cause it 'll be hemidesmoseomes,and c could not be cause it 'll be ocludens zone)
Local anesthetics
A. do not readily pass the blood-brain barrier.
B. interfere with the propagation of action potentials in nerve fibres.
C. selectively interfere with the propagation of action potentials in nociceptive fibres.
D. do not have an effect on any other tissue than the nervous tissue.
my ans b
0.12% chlorhexidine mouthrinses are effective in modifying plaque quantity and quality because of their selective activity against
A. streptococcus sanguis.
B. lactobacillus acidophilus.
C. streptococcus mutans.
D. lactobacillus casei
my ans c
For a 62 year old female with complete dentures who has never smoked, which of the following clinical lesions has the highest probability of progressing to squamous cell carcinoma?
A. Smooth red patch of the mid posterior dorsal tongue.
B. Bilateral buccal mucosal leukoedema.
C. White plaque of the mandibular alveolar ridge mucosa.
D. White plaque of the ventral tongue
my ans d
Post-immunization serological test results for a health care worker who has completed the series of vaccinations against hepatitis B is informed that their anti-HBsAg is less than the value required for immunity. The health care worker should
A. receive one additional vaccination followed by post-immunization testing.
B. undergo the full series of hepatitis B vaccinations followed by post-immunization testing.
C. refrain from performing any exposure-prone procedures for a period of 3-6 months followed by a full series of hepatitis B vaccinations.
D. have liver function tests performed to assess liver damage from a previous hepatitis B infection.
my ans a
Oral foci of infection are of greatest concern in patients with which of the following conditions?
A. Type 2 diabetes.
B. Iron deficiency anemia.
C. Hypertension.
D. Rheumatic heart disease.
my ans d
In fibrous dysplasia
A. foci of cartilage are a common histological finding.
B. an inflammatory infiltrate is characteristically present.
C. there are characteristic changes in the blood chemistry.
D. a ground-glass appearance is present on radiographs
my ans D
A draining fistula of short duration related to a tooth undergoing endodontic therapy requires
A. irrigation of canals.
B. antibiotics.
C. surgical excision.
D. no special treatment
my ans D(i doubt with A???)
Which of the following results from a necrotic pulp?
A. Dentigerous cyst.
B. Lateral periodontal cyst.
C. Dental granuloma.
D. Pulp polyp.
E. Periapical osteofibrosis
my ans c
The histopathologic changes in chronic gingivitis are characterized by
A. loss of rete pegs and dissolution of the basement membrane.
B. hyalinization of the principal fibres of the periodontal ligament.
C. disruption of the gingival fibres and an inflammatory infiltrate of plasma cells and lymphocytes.
D. an inflammatory infiltrate in which polymorphonuclear cells predominate.
my ans c
Chronic periodontitis is characterized as
A. inflammatory.
B. irreparable.
C. atrophic.
D. hyperplastic.
E. none of the above
my ans A
Which patient would NOT be predisposed to liver toxicity following a dose of 1,000mg of acetaminophen?
A. An adult with liver cirrhosis.
B. A chronic alcoholic.
C. A diabetic.
D. A 15kg, 4 year old child.
my ans c
Composite resin is a satisfactory core material for endodontically treated teeth provided
A. the resin has a high contrast colour with tooth structure.
B. there is an adequate ferrule.
C. the resin is autopolymerizing.
D. subsequent crown margins are not located on cementum
my ans A
thanks guys