Sterilization of carious dentin without pulp injury is assured by the application of

Sterilization of carious dentin without

pulp injury is assured by the application of

A. phenol.

B. 70% ethyl alcohol.

C. chlorhexidine.

D. absolute alcohol.

E. None of the above.

Asnwer: E
We can never assure sterilization of dentin or even root canal.

Which of the following microorganisms are most frequently found in infected root canals?

Which of the following microorganisms are

most frequently found in infected root canals?

A. Streptococcus viridans.

B. Staphylococcus aureus.

C. Lactobacilli.

D. Enterococci.

E. Staphylococcus albus.

Asnwer: A
Primary root canal: Streptococcus
Failed root canal: Enterococci

A patient has suffered a blow resulting in the loosening of three maxillary incisors. Vitality tests give negative readings. The most appropriate management would be to

A patient has suffered a blow resulting in the

loosening of three maxillary incisors. Vitality

tests give negative readings. The most

appropriate management would be to

A. perform pulpectomies on the teeth.

B. remove the teeth, fill the root canals

and replant.

C. splint the teeth, check vitality in one

month and if negative, treat

endodontically.

D. splint the teeth and treat

endodontically immediately.

Asnwer: C
We splint with flexible wire and should allow for natural revascularization to happen. If revascularization did not happen, then we do Root canal treatment.

Which of the following statements concerning root canals and their foramina is NOT true?

Which of the following statements concerning

root canals and their foramina is NOT true?

A. Root canals bifurcate and have dual

foramina.

B. The major foramen is precisely at

the apex of the tooth.

C. The root canals may join and have a

single foramen.

D. The dentino-cemental junction is

precisely at the apex of the tooth.

E. A cross section of the canal in

the apical region is relatively round.

Answer: D

This junction is through-out the entire root length, unlike the cemento-enamel junction.

A carious maxillary central incisor with acute suppurative pulpitis requires

A carious maxillary central incisor with acute suppurative pulpitis requires:

A. immediate endodontics and apicectomy.

B. incision and drainage.

C. opening of the canal and drainage for one week.

D. pulpotomy.

Answer: D

Most dentists are tripped by the word "suppurative" thinking that there's pus forming or the condition being chronic apical abscess. But Acute Suppurative Pulpitis is just another term for acute pulpitis. So the answer would be Pulpotomy or Pulpectomy.