In vitro wear of resin-based materials--simultaneous corrosive and abrasive wear.
The aim of this study was to evaluate the wear of resin-based materials caused by the association of abrasive and corrosive processes. Twenty specimens were prepared for each material, cast in epoxy in acrylic rings, polished, and profiled with an MTS 3D Profiler. Antagonists were made from deciduous molars. Specimens were distributed into eight groups (n = 10), according to the material (Filtek Supreme, Point 4, Dyract AP, and Fuji II LC) and the type of slurry (neutral and acidic), and then cycled 100,000 times in the OHSU oral wear simulator. The specimens were cleaned and reprofiled. Volume loss and maximum depth were determined. ANOVA and Tukey's test were used for data analysis (p < 0.05). The area of the wear facet on the antagonist was also measured. Composites displayed less wear than the compomer and the resin-modified glass ionomer. Significant differences also were found for cusp wear, with a significant positive correlation shown between cusp and material wear. The acidic slurry significantly increased the wear of the materials compared to the neutral slurry. Exposure to acidic slurry accelerated the wear of resin-based materials.
Correr
Gisele Maria
GM
Department of Restorative Dentistry, Dental Material Area, Piracicaba Dental School, University of Campinas, 13414-018 Piracicaba, São Paulo, Brazil. rmpuppin@fop.unicamp.br
Bruschi Alonso
Roberta Caroline
RC
Correr Sobrinho
Lourenço
L
Puppin-Rontani
Regina Maria
RM
Ferracane
Jack Liborio
JL
D001672:Biocompatible Materials; D003343:Corrosion; D003743:Dental Enamel; D012117:Resins, Synthetic; D014072:Tooth Abrasion
D001672:Biocompatible Materials; D012117:Resins, Synthetic