Resin

Restorative Composite Resins Overview ? Direct restoratives ? composition ? classification ? mathematical operation factors Flowable ? Packables ? Composite ? ? corporeal with two or more unequivocal substances ? metals, ? soft ? ceramics or polymers dental resin composite organic-resin ground substance inorganic-makeweight particles polymer ceramic ? hard, ? ? Most frequently used ? esthetic-restorative material  floor ? 1871 silicates ? alumina-silica scrap & phosphorous acid ? very soluble ? low-down automatonlike properties ? polymethylmethacrylate ? high ? 1948 - acrylic resins polymerization shrinking  fib (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 In dications Anterior restorations ? piece of tail restorations ? ? preventive resin ? conservative class 1 or 2 Contraindications boastful posterior restorations ? Bruxism ? Poor isolation ? Advantages Esthetics ? Conservation of tooth body structure ? bond certificate to tooth structure ? Low thermal conductivity ? Alternative to amalgam ? Disadvantages proficiency predisposition ? 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-GMA 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, enact it on our website: BestEssayCheap.com

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