FDA recommends that reusable dental drill handpieces and related instruments (such as air or water syringes and ultrasonic scalers) be heat-sterilized between patients to reduce the risk of disease transmission. All of the  handpieces (drills) in our office are also thoroughly wiped with the surface disinfectant and then sterilized in a pressured steam oven. All of our prophy angles (cleaning & polishing instrument) are disposable so that you and your family can be assured that you will always have a fresh new one every time you have your teeth cleaned.