Wear resistance of a new resin-cement, MSM-107

Methods: The resin-cement materials examined in this study were MSM-107, Linkmax(GC), Variolink2(Ivoclar Vivadent), Multilink Automix(Ivoclar Vivadent), Panavia F2.0(Kuraray), Esthetic Cement(Kuraray) and Resicem(Shofu). The specimens were prepared by cementing(light-curing mode) bovine enamel and porcelain(GN1 Ceramic Block, GC) with each resin-cement according to manufacturers’ instructions. The cement-thickness was set at 150micrometer using plastic tape. The three body wear test was performed with original wear machine for 500,000-cycles. The specimens were dropped 10mm to appetite-block and reciprocated on appetite-block 8mm-length parallel to cement-line in the slurry mixture of PMMA-particles and Glycerin. WR was compared by measuring wear-depth which is difference in level between worn cement-line and porcelain(n=10).

Results: Mean values(SD) are shown below. asterisk(**) indicates significant difference(T-test, **: p<0.01,) compared with MSM-107 in the same column.  MSM-107 showed significantly higher WR than other resin-cements tested.

 Conclusions: MSM-107 demonstrates the highest wear resistance among the resin-cements. This result suggests that MSM-107 is suitable resin-cement for most clinical cases, including inlay restorations.