1. Resin Cements
DA122 Dental Materials

2. Common Uses for Resin Cements:
Permanent cementation of:
Metal crowns
Bonding porcelain crowns + bridges (Maryland included)
Inlays
Onlays
Veneers
Bonding orthodontic brackets
Endodontic posts

3. Special Properties: Some are shaded
Radiopaque (show up bright white on radiograph)
Can irritate pulp and require a liner first
Tooth structure must be free of plaque and debris
Requires special preparation of tooth surface (etching agent) for resin cement to adhere to tooth

4. 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 cure
Armamentarium:
Etching system
Bonding system
Cement kit
Mix pad
Spatula (disposable plastic sort)
2x2 gauze
Curing light

5. Two Curing methods Light cured Self (auto) cured
What do you think this means?

6. 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

7. Self (auto) cured Resin supplied as two pastes
Polymerization occurs through a chemical reaction
No curing light involved

8. Mixing Instructions: Mixing surface: paper pad
Mixing instrument: disposable spatula
Mix time: seconds, until homogeneous in consistency
Set 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

9. Appearance: Tooth colored
Shaded to match porcelain or resin restoration

10. Clean up: Disposable paper pad is used
Remove layer used and discard, disinfect pad prior to putting away
Disinfect disposable spatula, or throw away
Clean excess off of crown margin before curing completely

11. Common brand names:
Relyx
Nexus

12. Another common brand of resin cements:

13. 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

14. All ceramic crown cementation
Preparation etched for 15 seconds, rinsed and dried
Dentin primer painted on preparation

15. All ceramic crown cementation
Dual cure adhesive painted on preparation
All-ceramic crown cemented with dual-cure composite resin cement

16. Final all-ceramic crown
Excess cement removed; crown light cured for 30 seconds on facial surface, 30 seconds on lingual surface
The final restoration, highly esthetic and translucent
Copyright 2012 Porter & Chester Institute, Inc. All rights reserved