What is the primary concern when using a high-speed dental handpiece?

The primary concern when using a high-speed dental handpiece is heat generation. During operation, the high-speed handpiece rotates at a very high RPM (revolutions per minute), which can create significant friction when in contact with tooth structure. This friction leads to the production of heat, which can potentially cause damage to the dental pulp and surrounding tissues if not managed properly.

To mitigate this risk, it is essential to use adequate water spray to keep the tooth cool during procedures. This water coolant not only helps to reduce the heat generated but also provides visibility through the removal of debris and blood from the surgical site. Without proper temperature control, the high-speed handpiece could create a situation where thermal injury may occur, making heat management a crucial aspect of safe dental practice.

The other concerns, such as increased noise, difficulty in handling, and excessive vibrations, are considerations that may affect the operator's experience or patient comfort but do not pose as direct a risk to patient health or the outcome of treatment as heat generation does.