... plastic that it may be pulled awy ffrom the margins, even by the sharpest carving instrument. After the carving, the surface of the restoration should be smoothed. This may be accomplished by judiciously burnishing the surface and margins of the restoration. If the alloy is reasonable fast-setting one, it should have achived sufficient strength by this time to support firm but not heavy rubbing pressure. Buernnishing of the occlusal anatomy can be accomplished with a ball burnisher. A rigid flat bladed instrument is best used to smooth the surfaces. Final smoothing can be concluded by rubbing the surface with a moist cotton pellet or by lightly going over it wih a rubber polishing cup and polishing paste. Burnishishing has been a somewhat controversial subject, and its exact effect on marginal adption and hardness is not well defined. There is ample evidence that amalgam surfaces that have been burnished, or bur nished andlightly ...

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