Chapter 01: Introduction to Restorative Dental Materials
Powers: Dental Materials, 11th Edition
MULTIPLE CHOICE
1. What causes caries?
a. Food debris
b. Materia alba
c. Acidic foodstuff
d. Bacterial plaque
e. Salivary glycoproteins
ANS: D
Feedback
A Food debris does not have the structural organization of bacterial plaque
biofilm.
B Materia alba does not have the structural organization of bacterial plaque
biofilm.
C Acidic foodstuff lowers pH and may demineralize teeth but does not directly
cause decay.
D Caries is caused by biofilm; also known as bacterial plaque.
E Salivary glycoproteins form the acquired enamel pellicle to which bacteria
adhere.
DIF: Knowledge REF: p. 1 OBJ: 2
TOP: CDA, GC, V, A,1b. Patient Education and Oral Health Management
MSC: NBDHE, 6.0 Providing Supportive Treatment Services, 6.1 Properties and Manipulation of
Materials
2. Caries is most likely to occur on which of the following tooth surfaces?
a. Buccal
b. Lingual
c. Occlusal
d. Interproximal
e. C and D are both correct.
ANS: E
Feedback
A Buccal surfaces are also susceptible to caries; however, there is less surface area
left unchecked.
B Lingual surfaces are also susceptible to caries; however, there is less surface
area left unchecked.
C Caries is most likely to occur in pits and fissures on the occlusal surface and on
interproximal tooth surfaces where plaque accumulates unchecked.
D Caries is most likely to occur in pits and fissures on the occlusal surface and on
interproximal tooth surfaces where plaque accumulates unchecked.