chapter 44: Dental liners, bases, and bonding

Purpose of using dental liners, bases and bonding material

To protect the pulp and dentin from decay before restoration.

What can happen if decay reaches dentin

Patient can experience sensitivity and discomfort

Physical pulpal stimuli

Result from thermal changes

Mechanical pulpal stimuli

Result from pulpal vibrations, trauma or pressure

Chemical pulpal stimuli

Result of acidic materials reaching pulpal tissue

Biological pulpal stimuli

Result of saliva bacteria reaching pulpal tissue

Cavity liner

placed in deepest cavity prep to protect dentin and pulpal tissue and reduces micro microleakage

Examples of cavity liners

Calcium hydroxide ( Dycal) and Glass ionomers

Cavity sealers

Provides protective layer (over cavity liner) and reduces micro leakage

Examples of cavity sealers

Varnish and fluoride varnish

What cavity sealer is only used with amalgam restoration

Varnish

Desensitizer

Reduces sensitivity and should not be in contact with soft tissue

Dental bases

provides additional pulpal protection for deep to very deep cavity prep

Examples of dental bases

Zinc oxide, zinc phosphate and glass ionomers

Dental enchant

prepares a tooths surface by removes the smear layer for adhesion of material

Dental bonding

Provides dental adhesion of one material to another