Which technique is crucial for polishing teeth with a mechanical polisher?

The technique of having the cup of the mechanical polisher moving before it makes contact with the tooth is crucial for several reasons. First, this approach minimizes the risk of damaging the enamel, which can occur if a stationary cup makes direct contact with the tooth surface. When the cup is already in motion, it helps to provide a smoother application of polishing paste on the tooth, reducing the friction and the resulting heat generated during the polishing process.

Additionally, starting the motion before contact allows the dental assistant to properly position the cup, ensuring that it is aligned correctly with the surface of the tooth. This alignment is essential for effective polishing and can help reach interproximal spaces more efficiently. Ensuring that the cup is in motion also contributes to a more comfortable experience for the patient, as a stationary cup could lead to an abrupt sensation upon contact.

In summary, initiating the motion of the cup prior to making contact with the tooth is key to achieving effective and safe polishing results.