Chapter 05. Principles of Bonding

Chapter 5: Principles of Bonding

1. The acid used most commonly to etch tooth structure for

bonding procedures is


a. Citric

b. Hydrochloric

c. Hydrofluoric

d. Phosphoric: d

2. Which one of the following statements about bonding to

enamel is true?


a. Bonding is achieved by micromechanical retention.

b. Bonding is achieved by chemical bonds.

c. Bonding is achieved by resin tags penetration the collagen

mix.

d. Bonding to enamel is less reliable than bonding to dentin.: a

3. Bonding to dentin by the total-etch technique

, a. is best on dentin that has been etched with 37% phosphoric

acid for 30 seconds

b. is stronger when the dentin is well dried after etching

c. is inhibited by formation of the hybrid layer

d. is best accomplished when the dentin is kept moist after

etching: d

4. One of the following statements about total-etch resin is

true. Which one?


a. Water is the most common solvent used with these bonding

agents

b. They form a hybrid layer the best with dry dentin.

c. They chemically bond to the composite resin.

d. They chemically bond to the dentin.: c

5. Self-etching bonding systems


a. use 37% phosphoric acid as the etchant

b. use acidic primers to etch the tooth surface

c. require rinsing after etching