When performing coronal polishing, how should the prophet cup be rotating?

The correct approach to the rotation of the prophy cup during coronal polishing is that it should begin after the cup is placed in the mouth and before it touches the tooth. This practice ensures that the cup is up to speed and reduces the risk of splattering debris or creating discomfort for the patient. Starting the rotation while the cup is still outside of the mouth can cause splatter and is less effective in terms of achieving the proper polishing action when the cup finally makes contact with the tooth.

Continuously rotating the cup during the procedure is important for effective polishing and maintaining the cup's effectiveness against the tooth surface. However, the crucial step is ensuring that the rotation is initiated correctly—after placement in the mouth and prior to dental contact. Proper techniques not only optimize the polishing process but also enhance patient comfort and safety during the procedure.