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Volume 15 , Issue 5
September/October 1995
Pages 483-496

A new copolymerized composite resin system: A multiphased evaluation

Suzuki/Cox/Leinfelder/Snuggs/Powell

PMID: 9601248

Most microfilled composite resins are relatively resistant to generalized wear; however, they commonly exhibit poor resistance to localized wear becaues of debonding of prepolymerized particles from the resin matrix. A copolymerized new composite resin, in which the filler particle trimethylolpropane-trimethacrylate is chemically bonded to the resin matrix, is evaluated. Epic-TMPT was subjected to both generalized and localized wear tests that revealed that its wear resistance was higher than that of other composite resin systems. Epic-TMPT in posterior occlusal cavities showed less than 8 um of wear for each restoration, 1 year after placement. Placement of Epci-TMPT into large anterior abfraction lesions withour mechanical retention, with surface etching, and subject to severe traumatic occlusion resulted in 87% retention 1 year after plaement. In vivo usage biocompatibility tests demonstrated nopulpal irritation or inflammation when Epic-TMPT was placed on vital dentin of crown preparations with complete enamel removal.

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