A new copolymerized composite resin system: a multiphased evaluation.
Most microfilled composite resins are relatively resistant to generalized wear; however, they commonly exhibit poor resistance to localized wear because 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 microns of wear for each restoration, 1 year after placement. Placement of Epic-TMPT into large anterior abfraction lesions without mechanical retention, with surface etching, and subject to severe traumatic occlusion resulted in 87% retention 1 year after placement. In vivo usage biocompatibility tests demonstrated no pulpal irritation or inflammation when Epic-TMPT was placed on vital dentin of crown preparations with complete enamel removal.
Suzuki
S
S
Department of Restorative Dentistry, University of Alabama, School of Dentistry, Birmingham 35294-0007, USA.
Cox
C F
CF
Leinfelder
K F
KF
Snuggs
H M
HM
Powell
C S
CS
D000818:Animals; D003188:Composite Resins / Q000737:chemistry*; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D008253:Macaca mulatta; D008422:Materials Testing; D010316:Particle Size; D019237:Tooth Cervix
D003188:Composite Resins; D017220:Dentin-Bonding Agents; C097956:Epic TMPT