A comparison of wear rate of direct and indirect resin composites: A two-body wear abrasion test

• Published in: Journal of composite materials 2015-09, Vol.49 (21), p.2599-2607
• Main Authors: Yildirim Bicer, Arzu Zeynep, Karakis, Duygu, Dogan, Arife, Mert, Faruk
• Format: Article
• Language: English
• ISSN: 0021-9983; 1530-793X
• DOI: 10.1177/0021998314550845

Purpose The objective of this in vitro study was to investigate and compare two-body wear of hybrid, microhybrid, and nanohybrid direct and indirect composite resins. Materials and methods A pin-on-disc wear device was used to study the effects of the water on two-body wear rate of two microhybrid composites (Solidex® and Dialog®), a nanohybrid composite (Grandio®SO), and three direct composite resins: a hybrid composite (Herculite Classic™), a submicron hybrid composite (Charisma®), and a nanohybrid composite (Tetric® N-Ceram). For testing, 12 specimens of each material with 6.5 mm diameter and 4 mm height were made and half of the specimens were stored in the distilled water for 1 week at 37℃. In order to evaluate the wear rate of samples, a normal load of 15 N was applied to specimen’s surface. The 6.5 mm diameter composite sample held to pin holder and AISI 316 L stainless steel was employed as the disc. The following experimental parameters were kept constant for all tests: sliding velocity = 0.6 m/s, temperature 25 ± 3℃, 1.2 Hz, and 10,000 cycles. One-way Analysis of Variance (ANOVA) and post hoc Tukey’s test were performed to compare the wear rate of resin composites. Results Ranking of wear rate (most to least) without water exposure was as follows: Dialog>Solidex>Charisma>GrandioSO>Tetric Ceram=Herculite. No significant difference in wear was observed between GrandioSO, Tetric N-Ceram, and Herculite Classic, with and without water exposure (p > .05, respectively). Conclusions The nanohybrid resins—regardless of indirect or direct use—showed significantly less abrasive wear than the microhybrid resins.