DA122 DENTAL MATERIALS

Resin Cements

Common Uses for Resin Cements:

Permanent cementation of: Metal crowns Bonding porcelain crowns + bridges (Maryland

included) Inlays Onlays Veneers Bonding orthodontic brackets Endodontic posts

Special Properties:

Some are shadedRadiopaque (show up bright white on

radiograph)Can irritate pulp and require a liner firstTooth structure must be free of plaque and

debrisRequires special preparation of tooth surface

(etching agent) for resin cement to adhere to tooth

Ratio/Armamentarium:

Ratio: equal amounts of base and catalyst (1:1) May also be packaged as a syringe or in a jar, as a light

cure or dual cureArmamentarium:

Etching system Bonding system Cement kit Mix pad Spatula (disposable plastic sort) 2x2 gauze Curing light

Two Curing methods

Light curedSelf (auto) curedWhat do you think this means?

Light Cured

One cure method requires the use of an additional piece of equipment-curing light

This method of “setting” the material is known as light-cured

Self (auto) cured

Resin supplied as two pastesPolymerization occurs through a chemical

reaction No curing light involved

Mixing Instructions:

Mixing surface: paper padMixing instrument: disposable spatulaMix time: 20-30 seconds, until homogeneous in

consistencySet time:

Light cure: 40 seconds per tooth surface (read directions for time. Clearfil is light cured for 2-5 seconds) Used for porcelain, veneers, ortho brackets

Self cure: 10 minutes Used for metal and endo posts

Dual cure: 40 seconds for initial set, then 10 minutes for complete set

Appearance:

Tooth coloredShaded to match porcelain or resin

restoration

Clean up:

Disposable paper pad is used Remove layer used and discard, disinfect pad prior to

putting awayDisinfect disposable spatula, or throw awayClean excess off of crown margin before

curing completely

Common brand names:

RelyxNexus

Another common brand of resin cements:

Preparation for all-ceramic crown

• The Twin Luscent Anchor was cut down to the level of the access with a diamond on a high speed handpiece

Restoration of the access and Class 3’s with composite resin. Note, no discoloration of gingiva with Twin Luscent Anchor

• Preparation for an all-ceramic crown

All ceramic crown cementation

• Preparation etched for 15 seconds, rinsed and dried

• Dentin primer painted on preparation

All ceramic crown cementation

• All-ceramic crown cemented with dual-cure composite resin cement

• Dual cure adhesive painted on preparation

Final all-ceramic crown

• Excess cement removed; crown light cured for 30 seconds on facial surface, 30 secondson lingual surface

• The final restoration, highly esthetic and translucent

• Copyright 2012 Porter & Chester Institute, Inc. All rights reserved