UNFINISHED DEN 102 Dental Cements (Helpful for Test 2)

Dental cements notes/Test 2 info.

Cement

binds two surfaces together

Cavity Varnishes

• used with amalgam only

• seals the dentinal tubules

• copal varnish solvent

• insoluble in water

• solvent is alcohol or chloroform

Who determines the classifications of dental cements?

• ISO

• ADA

Type I Cement

• luting cements

• retain restorations onto the teeth

• crowns, bridges, inlays, onlays, veneers

Type II Cement

• restorative/preventive cements

• IRM, sealants

Type III Cement

• liners and bases

• protect the pulp by providing a bacterial barrier and preventing fluid movement down the dentin tubules (provides protection and recovery)

Use of Dental Cements

• pulpal protection

• retention of indirect restorations

• provisional (temporary) restorations

• intermediate restorations

• root canal sealers

• surgical dressings

How do the Cements Provide Pulpal Protection

• protect against physical stimuli (thermal changes)

• protect against mechanical stimuli (forces and stress on the teeth)

• protect against chemical stimuli (chemicals within restoration materials can cause irritation)

• protects against biological stimuli (bacteria and endotoxins from caries in tooth can cause irritation)

Hydrodynamic Effect

• pain caused by fluid movement in open unsealed dentin tubules

Options to Protect The Pulp

• Cavity varnish

• Liner

• Base

• Intermediate Restorative Material (IRM)

Liners

• protect the pulp by providing a bacterial barrier and preventing fluid movement down the dentin tubules

• thin layer

• placed first (closest to pulp)

• low-strength base

• provides protective barrier/cap to the pulp in deep cavities

Calcium Hydroxide

• dycal/limelite enhanced

• low-strength base liner

• bacteriostatic

• stimulates secondary dentin

• highly alkaline (neutralizes the acid of cements)

• highly soluble

• radiopaque (shows up very bright on x-rays)

• low compressive strength

Zinc Oxide Eugenol

• ZOE

• neutral pH

• soothing to pulp due to eugenol

• low-strength base

• incompatible with unfilled resins, composites, and glass ionomers

Glass Ionomers

• release fluoride

• chemically adhere to dentin

• resistant to acids

Resin-Modified Glass Ionomer

• vitrebond

• releases fluoride

• adheres to dentin

• seals dentin tubules

• thin paste