Operative Dentistry Quiz #1

What should be the main objective of the operative dentist?
a. diagnosis
b. treatment
c. prevention
d. making money!!

c. prevention

It is not necessary to restore a tooth to proper tooth form, function, or esthetics unless the patient requests it.
a. true
b. false

b. false

Enamel rods are parallel to the external tooth surface and DEJ
a. true
b. false

b. false

According to the hydrodynamic theory, pain transmission in the tooth:
a. results from dimineralization of enamel changing the surface topography of the enamel rods
b. occurs due to small, rapid movements of fluid within dentinal tubules
c. cannot occur be

b. occurs due to small, rapid movements of fluid within dentinal tubules

Secondary dentin continuously deposits throughout the life of the tooth while tertiary
dentin only forms in response to moderate irritation
a. True
b. False

a. true

In which area of the tooth do the enamel rods orient themselves apically as they progress
from the DEJ to the external tooth surface?
a. Cusp tips
b. Developmental grooves
c. Cervical
d. No enamel rods orient apically.

a. Cusp tips

The pulp found in the pulp canals of the root is referred to as ________ pulp

radicular

Which of the following is found in enamel, dentin, and cementum?
a. Collagen
b. Macrophages
c. Hydroxyapatite
d. Protein polysaccharides.

c. hydroxyapatite

Match the following primary components of a tooth to the cells that form it.
a. Enamel
b. Cementum
c. Dentin
d. Pulp
1. cementoblasts
2. odontoblasts
3. ameloblasts
4. fibroblasts

a - 3
b - 1
c - 2
d -4

The tooth is essentially a semipermeable membrane-like structure with the capacity to
function in mastication and defend and repair itself to a limited degree from trauma,
bacterial invasion, and chemical demineralization.
a. True
b. False

a. true

In order for demineralization of enamel to occur, which of the following are needed?
a. Tooth
b. Sugar intake
c. Bacterial plaque
d. All of the above
e. A and B only

d. all of the above

The frequency of intake is more important than the quantity of sugar producing foods
ingested.
a. True
b. False

a. true

The most effective mechanism by which fluoride inhibits demineralization is
a. Incorporation into enamel lattice
b. Chemically bonding with plaque.
c. Inhibiting acid production.
d. Enabling reprecipitation of calcium and phosphate at the tooth surface.

a. incorporation into enamel lattice

What is the highest pH at which enamel begins to dissolve?
a. 3.0
b. 4.5
c. 5.5
d. 6.5

c. 5.5

Which of the following surfaces is the most favorable habitat for a pathogenic plaque?
a. Pits and fissures.
b. Smooth enamel surfaces gingival to the proximal contact area.
c. Smooth enamel surfaces in the occlusal 1/3 of the buccal and lingual.
d. Root

a. pits and fissures

Once caries reach the DEJ, it spreads laterally and pulpally via dead tracts.
a. True
b. False

b. false (it's via dentinal tubules)

MS and Actinomyces initiate cares in pits and fissures of posterior teeth.
a. True
b. False

b. false

Under ideal conditions, carious dentitions can be managed so that caries is arrested and the demineralization and remineralization are in equilibrium.
a. True
b. False

a. true