CONTENTS 1. DEFNITIONS 2. HISTORY 3. INDICATIONS 4. CONTRAINDICATIONS 5. ADVANTAGES 6. DISADVANTAGES 7. COMPOSITION 8. POLYMERIZATION 9. CLASSIFICATION 10. IDEAL REQUIEMENTS 11. PROPERTIES 12. CURING TECHNIQUES 13. CURING LAMPS 14. CONCLUSION
INTRODUCTION Dental amalgam has been restorative material of choice for many decades how ever, in recent years, there has been increasing awareness about the safety of dental amalgam, mainly in respect to possible mercury toxicity that may affect human health and the environment and people are more conscious about esthetics.
As we know greatest assets a person can have is a smile that shows beautiful natural or naturally appearing teeth. When teeth are discolored, malformed, fractured there is often a conscious effort to avoid smiling.
These concerns have helped the dental profession to focus on the need to develop alternative restorative materials that esthetically and with out hazardous effects of Hg can restore the tooth back to form, function and esthetics. There are 5 tooth colored restorative materials Silicate cements Unfilled resin Filled resin Alumino silicate polyacrylate cement Porcelain
Dental composites have been considered acceptable restorative material for anterior, application for many years. Their improved mechanical properties, tooth color matching ability and lack of metallic mercury have caused them to be promoted as an adjunct to or substitute for dental amalgam in the restoration of posteriors. DEFNITIONS
The term composite refers to a three dimensional combination of at least 2 chemically different materials with a distinct interface separating the components.
According to Anusavice: Composite material may be defined as a compound of 2 or more distinctly different materials with properties that are superior or intermediate to those of the individual constituents.
According to Oxford dictionary a composite is a materials that is made up of several parts.
HISTORY Silicates were the first translucent material available .this cement was introduces by Fletcher in 1878 in England. This cement was extensively
used to restore carious lesion in the anterior teeth for more than 60 years. Because of the high fluoride content, the adjacent enamel was thought to render more resistant to recurrent caries. These cement were more susceptible to caries and they were easily detected because of their discoloration and loss of contour. Self curing acrylic resins for anterior restorations