Dental Composite

Dental composite resins are esthetic dental restorative material  made of synthetic resins.

1. Dental Composite Lecture no.1 Done by Assistant lecturer Ahmed Ali Jasim Operative Dentistry Department College of Dentistry / Mustansiriyah University

2. Dental composite resins  are  esthetic dental restorative material  made of  synthetic resins.

3. History of Dental composite Before 1960 silicates and unfilled resins 1970s introduction of the two paste , UV and visible light activation All suffered from poor properties and esthetic

4. History of Dental composite 1980s introduction of the Micro-filled composite Better esthetic but poor strength 1990s until now introduction of the Hybrid composite Better esthetic and properties and handling

5. Composition of Dental composite Composite resins are most commonly composed of : Monomers (synthetic resin) organic phase Photo initiator Coupling agent Matrix Filler material such as (silica / glass ) inorganic phase Further tailoring of physical properties is achieved by formulating unique concentrations of each constituent.

6. Filler types and particle size Glass fillers (silica zirconia alumina etc…)can be further subdivided based on their particle size and shapes such as: Macro-filled filler 5 - 10 µm Micro-filled filler ~ 0.4 µm Hybrid filler 0.01 - 8 µm Nano-filled filler 20-70 nm Nano-Hybrid filler Nano – micro mix

7. Setting mechanisms of Dental composite Types of setting mechanisms: Chemical cure (self-cure / dark cure) Light cure Dual cure (setting both chemically and by light)

8. Advantages of Dental composite : Reasonably inexpensive Lack of corrosion Reduced mercury exposure Reparability

9. Advantages of Dental composite : Insoluble Bonding to tooth structure Good tooth-like appearance Insensitive to dehydration Easy to manipulate Tooth-sparing preparation Reasonably inexpensive Lack of corrosion Reduced mercury exposure Reparability

10. Disadvantages of Dental composite Composite shrinkage and secondary caries Durability Skill and training required Isolation Time and expense

11. Classification of Dental composite according to handling characteristics Universal: advocated for general use, oldest subtype of resin composite Flowable : fluid consistency, used for very small restorations Packable : stiffer, more viscous material used solely for posterior parts of the mouth

12. Classification of Dental composite according to location of fabrication of the restoration Direct dental composites (inside patient mouth) Filling cavity preparations Filling gaps (diastemas) between teeth using a shell-like veneer or Minor reshaping of teeth Partial crowns on single teeth

13. Classification of Dental composite according to location of fabrication of the restoration Indirect dental composites (outside patient mouth ) Filling cavities in teeth, as fillings, inlays and/or onlays Filling gaps (diastemas) between teeth using a shell-like veneer or Reshaping of teeth Full or partial crowns on single teeth Bridges spanning 2-3 teeth

14. Method and clinical application of Dental composite Cavity preparation and cleaning

15. Method and clinical application of Dental composite 2.Tooth surface preparation Acid etch or sand blast

16. Method and clinical application of Dental composite 2.Application of the bonding agent

17. Method and clinical application of Dental composite 3. Placement of the Dental Composite

18. Method and clinical application of Dental composite 3. Finishing ,Polishing And Checking Occlusion Of The Dental Composite