Resin

Restorative Composite Resins Overview ? Direct restoratives ? composition ? classification ? functioning factors Flowable ? Packables ? Composite ? ? corporeal with two or more unadorned substances ? metals, ? soft ? ceramics or polymers dental rosin composite organic-resin intercellular substance inorganic- filler particles polymer ceramic ? hard, ? ? Most frequently used ? esthetic-restorative material  memorial ? 1871 silicates ? alumina-silica starter & phosphorous acid ? very soluble ? deplorable machinelike properties ? polymethylmethacrylate ? high ? 1948 - acrylic resins polymerization shrinking  score (cont.

) ? ? 1962 Bis-GMA ? stronger resin 1969 filled composite resin ? improved mechanical properties ? less shoplifting ? paste/paste system ? ? ? ? 1970s acid etching and microfills 1980s light curing and hybrids 1990s flowables and packables 2000s nanofills Indications Anterior restorations ? piece of tail restorations ? ? preventive resin ? conservative class 1 or 2 Contraindications enceinte posterior restorations ? Bruxism ? Poor isolation ? Advantages Esthetics ? Conservation of tooth social organization ? bond certificate to tooth structure ? Low thermal conduction ? Alternative to amalgam ? Disadvantages proficiency aesthesia ? Polymerization shrinkage ? ? marginal leakage ? secondary caries ? operative sensitivity ? Decreased wear resistance Composition ? Resin matrix ? monomer ? initiator ? inhibitors O CH2=C-C-O-CH2CH-CH2O CH3 OH Bis-GM A CH3 -CCH3 O OCH2CHCH2O-C-C=CH2 OH CH3 ! ? pigments ? Inorganic filler ? glass ? quartz ? colloidal silica ? Coupling Agent Monomers ? ? ? Binds filler particles together Provides workability Typical monomers ? O CH2=C-C-O-CH2CH-CH2O CH3 OH Bisphenol A glycidyl methacrylate (Bis-GMA) CH3 -CCH3 O OCH2CHCH2O-C-C=CH2 OH CH3 ? Urethane dimethacrylate (UEDMA) CH3 CH3 O O O...If you want to get a full essay, put up it on our website: BestEssayCheap.com

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