Dental Adhesives

Question 1

Dental Etch

Answer 1

• the acid itself is usually a 35% phosphoric acid gel that is colored to make it visible on a tooth. Etching of dental enamel with acid removes the smear layer and opens enamel tubules.

Question 2

Total etch

Answer 2

• placed on all surfaces of enamel and dentin layers
• best used when large amount of bonding material is being placed and retention may be an issue.
• If prep of the tooth is anticipated not to be deep or near the pulp portion, a total etch is most efficient

Question 3

Selective etch

Answer 3

• applied only to the enamel surface
• if dentist thinks the acid gel might cause sensitivity in deep areas of the tooth, they might use this technique

Question 4

Self etch

Answer 4

• acid etch material and bond material are actually combined and layered onto the tooth in a single step. Very effective for a tooth that is expected to easily retain the restoration

Question 5

Self etch

Answer 5

• acid etch material and bond material are actually combined and layered onto the tooth in a single step. Very effective for a tooth that is expected to easily retain the restoration

Question 6

Generations 1-7, dentin bond in MPa

Answer 6

1st generation: 1-3
2nd generation: 2-8
3rd generation: 8-15
4th generation: 17-25
5th generation: 20-24
6th generation: 17-22
7th generation: 23-30

*17 MPa is the minimum required for successful adhesion to tooth structure