Wear Resistance of Resin-based Commercially Restorative Composites

Objectives: This study was carried out to evaluate the wear resistance of the commercially available restorative resin composites. Methods: Seven photo-cured commercial resin composites, Kalore (KA: GC Co.), Filtek Silorane (FSR: 3M ESPE), Filtec Surpreme XT (FSX: 3M ESPE), Clearfil Majesty (CM: Kuraray Medical Co.), Beatifil II (BE: Shofu Co.), Estelite " Quick (ESQ: Tokuyama Dental Co.), and Estelite P Quick (EPQ: Tokuyama Dental Co.) were filled into cylindrical metal sample-holder and light cured for 180 seconds. Finished and prepared ten specimens per group were subjected to the three-body-wear tests with the ACTA machine (Willytec GmbH, Germany) for 200,000 cycles after 1-day room temperature storages. The collected data (wear loss in ìm) were analyzed statistically using the one-way ANOVA and Tukey's multiple comparison test as the post-hoc test. Results: The wear loss values of ESQ (20 ìm) was the lowest within the composites tested, and significantly lower when compared with the KA, CM, and BE composite (p<0.05) respectively. The wear loss values of BE composite (29 ìm) was the highest. Conclusion: ESQ showed the superior wear resistance. The reasons might be the components of well dispersed submicrometer hybrid fillers having round particles and aromatic DMA may play important roles in the high wear resistance. This study was supported by grant (#22592132) from the Ministry of Education, Science, Sports and Culture of Japan.