The enamel structures most resistant to the action of acids are
A. cuticles.
B. lamellae.
C. rods.
D. interprismatic substances
My ans d
My Ans is C Rods see Pg 2 (
http://jdr.sagepub.com/content/39/1/141.full.pdf)
After tooth eruption, which of the following materials gradually decreases in concentration from the enamel surface ?
A. Carbonate.
B. Protein.
C. Fluoride.
D. Calcium.
E. Chloride
My ans a
Cleft lip and palate usually result from
A. failure of proper union of the median and lateral nasal processes.
B. failure of the union of the median nasal process with the lateral nasal and maxillary processes.
C. anhidrotic ectodermal dysplasia.
D. failure of development of both the lateral nasal and maxillary processes
My ans is b even if there is the lateral process which does not have nothing to do eith the cleft lip does anybody has another argument??
Lidocaine (Xylocaine)
1. is a local anesthetic agent.
2. has topical anesthetic properties.
3. is an antiarrhythmic agent.
4. has anticonvulsant properties.
A. (1) and (2)
B. (1) (2) (3)
C. (1) (3) (4)
D. (2) (3) (4)
E. All of the above
My ans b
After giving buccal infiltration anesthesia for the removal of a maxillary premolar, the patient complains of a sharp pain in the cheek which blanches. This is a result of
A. injecting too much solution.
B. injecting the solution too rapidly. Corr
C. stimulating sympathetic nerves around an artery.
D. intravenous injection.
My ans I have no idea somebody knows the answer
The tooth preparation for a porcelain veneer must have a
1. rough surface.
2. space for the veneer material.
3. definite finish line.
4. margin at least 1mm supragingivally.
A. (1) (2) (3) Corr
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above
My ans b??
A bitewing radiograph of tooth 1.4 reveals caries penetrating one third into the mesial enamel. The correct management of tooth 1.4 is to
A. place an amalgam restoration.
B. place a porcelain inlay.
C. place a direct composite restoration. I am not sure
D. apply fluoride and improve oral hygiene.
My ans d
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.
My ans c
Anesthetic solution deposited at the infraorbital foramen will NOT anesthetize the
A. skin and conjunctivum of the lower eyelid.
B. skin and mucous membrane of the upper lip.
C. median strip of skin of the nose.
D. maxillary anterior teeth.
E. mucosa of the anterior wall of the maxillary sinus.
My ans c
The left infraorbital nerve block anaesthetizes
A. all maxillary teeth on the left side.
B. the maxillary premolar on the left side, canine and incisor teeth.
C. the left maxillary canine and incisor teeth only.
D. the entire left maxillary sinus.
E. the entire left naso-lacrimal duct
My ans c
Needle deflection increases as
A. depth of injection increases.
B. needle length increases.
C. needle gauge increases.
D. All of the above.
My ans d
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
Have no idea I havent found a source of that(Ill go for cor d????)
The distal termination of the maxillary complete denture base is dictated by the
A. tuberosity.
B. foveae palatinae. I am not sure
C. posterior palatal seal.
D. vibrating line.
My ans is d
help me please
Following trauma, bluish-grey discolouration of the crown is due to
A. external resorption.
B. pulpal hemorrhage.
C. discoloured composite restoration
D. chromogenic bacteria.
my ans d or b
thank you in advance
