EXAM 2 Flashcards
1
Q
- In the contemporary order of tooth preparation, which of the following principles of tooth preparation should be accomplished first?
a. Outline form
b. Convenience form
c. Caries removal
d. Resistance form
A
b. Convenience form
2
Q
- In the contemporary order of tooth preparation, outline form, resistance form, and retention form become irrelevant.
a. True
b. False
A
b. False
3
Q
- Minimally invasive dentistry is meant to halt or delay the typical restorative cycle.
a. True
b. False
A
a. True
4
Q
- It is more important to remove the central caries prior to removal of the peripheral caries.
a. True
b. False
A
b. False
5
Q
- Demineralized tooth structure cannot remineralize.
a. True
b. False
A
b. False
6
Q
- It is more important to decrease sucrose quantity intake than to decrease sucrose frequency intake.
a. True
b. False
A
b. False
7
Q
- When preparing a posterior tooth for a slot preparation, one should:
a. Pay little or no attention to retentive form.
b. Primarily consider silver amalgam to be the restorative material of choice.
c. Critically examine the fissures and central groove of the tooth, and ensure no caries.
d. Always use a three in one bonding system as the adhesive.
A
c. Critically examine the fissures and central groove of the tooth, and ensure no caries.
8
Q
- The outline form of a cavity preparation incorporates aspects of all of the following, except:
a. Depth of the caries removal.
b. Final margin of the preparation
c. Peripheral extent of the lesion.
d. Should be smooth and flowing, following the anatomy and contour of the tooth.
A
a. Depth of the caries removal.
9
Q
- The outline if a cavity preparation is defined as:
a. The shape or form the preparation assumes after the retention form has been completed
b. The shape or form of the cavity on the surface of the tooth - (?)
c. That form the cavity takes to resist the forces of mastication
d. The shape or form of the preparation after carious dentin has been excavated
e. That form the cavity takes to resist dislodgement or displacement of the restoration
A
d. The shape or form of the preparation after carious dentin has been excavated
10
Q
- In general, using minimally invasive principles, undermined enamel does not need to be removed.
a. True
b. False
A
b. False
11
Q
- Aspects that influence the outline form of a tooth preparation include:
a. The lateral spread of the decay at the DEJ
b. The type of restorative material to be used
c. The tooth and its relative position in the arch
d. All of these
A
d. All of these
12
Q
- Bacterial plaque and biofilm are synonymous terms.
a. True
b. False
A
a. True
13
Q
- The direct causes of carious lesions commonly forming in similar sites on the tooth are influenced by all of the following, except:
a. Hydroxyl ions, left unbuffered, percolate into the enamel laminar pores.
b. Biofilm is markedly thicker in some locations than others.
c. Demineralization outweighs remineralization at the ionic level.
d. Multiple biofilm ecosystems in the same mouth.
A
a. Hydroxyl ions, left unbuffered, percolate into the enamel laminar pores.
14
Q
- Dental biofilm forms on tooth surfaces, and can be considered to have evolved, as humans have evolved, to be a benign and even beneficial part of the oral ecosystem. In hunter-gatherer populations what is the most probable beneficial effect of biofilm?
a. Biofilm has the capacity to prevent colonization of the tooth surface with acidogenic bacteria that have been transmitted from other individuals
b. Biofilm has the capacity to protect tooth surfaces against dissolution by occasional contact with acid foods
c. Biofilm has the capacity to prevent small fractures in the enamel through mechanical reinforcement
d. Biofilm has the capacity to prevent occlusal wear by abrasive foods through increased lubrication during mastication
A
b. Biofilm has the capacity to protect tooth surfaces against dissolution by occasional contact with acid foods
15
Q
- Dental corrosion differs from dental caries in several key respects. Which of the following statements best describes these differences?
a. Corrosion can be reversed by treatment of the tooth surface with matrix proteins and fluoride; caries cannot be reversed and must be restored with filling materials.
b. Caries softens the tooth surface, making it more liable to wear away during tooth-brushing or chewing hard foods; corrosion occurs most commonly in pits, fissures and other surface defects.
c. Caries can be treated by substituting drugs that increase salivary flow with those that decrease salivary flow; corrosion can be treated by substituting drugs that decrease salivary flow with those that increase salivary flow.
d. Corrosion is caused by acids in foods and drinks, or by gastric acid; caries is caused by acids produced by bacterial metabolism of simple sugars within [the biofilm]
A
d. Corrosion is caused by acids in foods and drinks, or by gastric acid; caries is caused by acids produced by bacterial metabolism of simple sugars within [the biofilm]