Conference Paper

In vitro Three-Body Wear of Nine Composite Materials

April 2009

Authors:

Kyungsung University

Objective: To measure the wear of 8 commercially available and 1 experimental composite resin using an in vitro wear test. Methods: 6x4mm flat composite specimens (n=8) were prepared by placing the composite resin in a split mold. The composites were covered with a glass slide and polymerized with a curing light (560mW/cm) following each manufacturer's directions. Specimens were stored in distilled water (24h /37 C), mounted in a brass cylinder and stored at 37C for 24 hours. After storage, the surfaces to be abraded were polished with 1200-grit SiC paper using a rotational polishing device, wet finished with 0.05 alumina slurry on a polishing cloth and cleaned in an ultrasonic bath for 10 minutes. Specimens were placed into a UAB wear machine using 50 PMMA beads and a load of 75N was applied with stainless steel styli (d=4.70mm) for 400,000 cycles. A 3-D non-contact profilometer (PROSCAN 2000) scanned the specimens and measured the wear depth and volume loss of the composites. Results were compared using a one-way ANOVA and post-hoc Tukey/Kramer test (p=0.05). Results: Materials Volume(mm³) Depth() Amelogen Nano Pearl Frost(AN-PF) 0.0290.02 61.1918.13 Amelogen Nano Pearl Soft(AN-PS) 0.0820.04 64.8818.13 Amelogen Plus(AP) 0.0890.03 125.3341.4 Experimental 0.1090.04 153.6932.59 EsthetX 0.0750.03 87.8829.93 Filtek Supreme Plus(FSP) 0.0290.03 59.8622.27 Jen Paragon(JP-A2E) 0.0340.03 56.4527.99 Jen Paragon(JP-A3) 0.0750.03 87.8829.93 Opallis(OP-EA3) 0.0350.02 74.6732.10 Opallis(OP-EA4) 0.0560.03 65.7226.19 Premise 0.0240.01 74.9419.04 Tetric Ceram(TC) 0.0430.02 80.9529.75 Vit I Escence(VIE) 0.050.03 62.6121.19 AN-PF, FSP, JP-A2E, OP-A4 and Premise had significantly lower volumetric wear (p<.05) while Experimental and AP showed significantly greater wear depth than the other composites (p<.05). Conclusion: Based on the results of this in vitro study, the experimental material showed lower wear resistance than other commercially available restorative composites. Funded in part by a grant from Ultradent.