A new prophylaxis instrument: effect on enamel alterations.

A study was made to determine the efficacy of a new jet abrasive tooth-polishing device and its effect on enamel surfaces. Extracted teeth with extrinsic stain were polished with the jet abrasive. Smoothed enamel surfaces were polished with the jet abrasive, a rubber cup with paste, and an ultrasonic instrument. The surface alterations were then compared.