High-speed dental handpiece, also known as high-speed handpiece, high-speed turbine handpiece, dental drill handpiece.etc. , is commonly used in dental treatment of medical instruments. Its working principle is to use compressed air as the power to drive the wind wheel to rotate at high speed, so as to drive the dental burs to complete the drilling and grinding of teeth. High-speed handpiece, which can rotate at more than 300,000 revolutions per minute, are mainly used for treatment and repair.