Abstract
This study compared the effects on tooth surface of three power-driven instruments commonly used to remove overhanging amalgam. Comparisons of methods of instrumentation were made on enamel, cementum, and amalgam. Cavitron, Roto Pro, and EVA system instruments were used. Findings showed significantly more abrasion on all surfaces in EVA groups compared with other groups. All surfaces in Roto Pro groups appeared to be smoother than in other groups. There appeared to be little difference between treated surfaces and control surfaces in the Cavitron group.
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