anybody knows the answers for these questions

[Guest guest]

1. A periapical infection of a mandibular third molar

may spread by direct extension to the

1. parapharyngeal space.

2. submandibular space.

3. pterygomandibular space.

4. submental space.

A. (1) (2) (3)

B. (1) and (3)

C. (2) and (4)

D. (4) only

E. All of the above.

2. Allergic reactions to amide-type local anesthetic

solutions are most likely caused by sensitivity to

A. lidocaine hydrochloride.

B. epinephrine.

C. methylparaben.

D. contaminants.

3. The most appropriate radiographic examination for

a 4 year old without visible or clinically detectable

caries or anomalies, and with open proximal

contacts is

A. maxillary and mandibular anterior

occlusals.

B. a pair of posterior bitewings.

C. maxillary and mandibular posterior

periapicals.

D. none.

4. The washing of hands must be performed before

putting on and after removing gloves because it

1. reduces the number of skin bacteria

which multiply and cause irritation.

2. completely eliminates skin bacteria.

3. minimizes the transient bacteria which

could contaminate hands through small

pinholes.

4. allows gloves to slide on easier when the

hands are moist.

A. (1) (2) (3)

B. (1) and (3)

C. (2) and (4)

D. (4) only

E. All of the above.

5. For prevention of cross infection, which of the

following impression materials can be treated with

a disinfecting spray solution/ agent?

A. Irreversible hydrocolloid (alginate).

B. Polyether.

C. Polysulfide.

D. Polysiloxane.

E. All of the above.

6. One week after an amalgam restoration is placed

in the mandibular first premolar, the patient returns

complaining of a sharp pain of short duration when

eating or drinking something cold. Teeth respond

normally to electric pulp testing and heat and the

radiographs are normal. The most likely diagnosis

is

A. hypercementosis.

B. reversible pulpitis.

C. pulpal microabscess.

D. acute apical periodontitis.

7. The most frequent cause of malocclusion is

A. thumbsucking.

B. mouth breathing.

C. heredity.

D. ectopic eruption.