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In vitro wear of packable dental composites.

The in vitro abrasion and attrition wear of several packable composites were evaluated on the Oregon Health Sciences University oral wear simulator and compared to two popular commercial composites. In general, the wear of the packable composites was equivalent to that of the nonpackable microfill and minifill composites. The wear of the enamel cusps opposing the composites in the wear machine was also found to be similar to that of enamel opposing the nonpackable composites. Based on these results, one would expect that these new packable composites would not offer improved clinical performance over current nonpackable composites in terms of wear resistance.