CHAPTER 44: DENTAL LINERS, BASES & BONDING SYSTEMS Flashcards
What is a cavity liner
- placed in the deepest area of excavation of cavity preparation
-protects the pulpal tissue from irritation
calcium hydroxide properties
-protects the pulp from irritation caused by physical, mechanical and biologic elements
-stimulation of secondary dentin
- It is compatible with all types of restorative materials.
Types of cavity liners
calcium hydroxide
glass ionomer
which liner is compatible with all restorative materials?
calcium hydroxide
forms strong bond to dentin and reduces microleakage
glass ionomer
What is a cavity sealer?
provides a protective layer within the PREPARED cavity.
types of a cavity sealer
Varnish
Flouride varnish
Desensitizer
has a higher fluoride concentration than any other fluoride marketed, being 5% or 22,600 ppm fluoride
fouride varnish
a type of sealer that consists of one or more natural resins dissolved in an organic solvent
varnish
application of varnish does what?
seals dentinal tubules
reduces microleakage around a restoration
protects the tooth from a highly acidic base (ie. zinc phosphate)
the use of fluoride varnish are as follows:
• Professional fluoride application
•hypersensitivity
• Orthodontic patients
• Cavity varnish
• Dentin sealant
when should varnish be applied?
after the liner is applied
What does dental varnish interfere with ?
composite resin
glass ionomer restorations
what is a desensitizer?
a type of sealer used to protect the tooth from hypersensitivity
what is the difference between a varnish and a desensitizer?
The chemical makeup of the product.
desensitizer is made out hydroxyethyl methacrylate (HEMA) and glutaraldehyde
in what areas of the tooth should a desensitizer NOT come in contact with ?
soft tissue
What is a dental base?
placed before the permanent restorative material when a tooth preparation becomes moderately deep to deep.