●using standard and proper diamond burs. Diamond burs with big-head and long shank should not be often used for their extra burden to the rolling bead .Too small burs will slip and too big head will stuck in the groove. If the burs are heavily weared, the bearings would have the extra burden. The stucking part in the handpiece have strict requirements about the burs. The diameter of burs must be between 1.59-1.60MM. Any windind, deforming and unstandard burs shouldn’t be used.
● maintaining the purity of water. If the water and air is not clean, the dirt will gather at the bearings or the holes for ejecting water and air. And it will damage the handpiece and spoil the treatment.
● Preventing rotating without diamond burs. Don’t push the diamond bur button when rotating. It is a wrong practice to rotate the handpiece without the burs or testing stick, or the stucking part will be damaged under high-speed rotation. When loading or unloading the burs, please open the stucking part for burs.
● Proceeding the strict cleaning and lubricating process. The handpiece must clean and lubricate after using. The shank of burs should be cleaned before loading.
● Preventing the operating pressure exceeding standard amount. The working pressure shouldn’t exceed the pressure on the manual guide, or the span of handpiece will shorten and have big noise.
● Using air turbine handpiece in turns. If individual air turbine handpiece is often used , the rolling beads in the bearings will extend the strength to outside body. The bearings will have mechanical tiredness for a long time using , so the bearing will be easy to be damaged.

The best way for sterilization
●Sterilization by autoclaving. It is the most efficient and adaptable way for sterilizing. And it also meets the requirements of Operation Norms about Sterilization of Medical Dental Equipment issued by National Sanitary Department.

● Prohibiting using ways of sterilization as follows:
Ⅰ.Chemical soaking sterilization: 1. The inner components of handpiece are complicated, so blood and saliva cannot be easy to clean.2.doctors must operate the handpiece according to the non-bacteria principle after sterilization. For example, with the non-bacteria water to clean the handpiece and then wipe it with non-bacteria paper, so the process is not convenient.3. The equipments sterilized with chemical soaking way are under the situation of naked body. so they have to use immediately after sterilization. And the other way is to put into another non-bacteria vessel, or the equipment will became dirty. 4. The chemical dose will damage the handpiece in a certain degree.
Ⅱ.Temperature sterilization without water.1.The efficient temperature for sterilization is 170 degree. For its high temperature, the material particle of handpiece will be spoiled and the whole handpiece will be damaged. 2.Every part of handpiece will not receive the average temperature under this sterilization. So it can not make it sure that the handpiece is non-bacteria. 3. The handpiece is easy to discolor.4. It cannot be applied to the sterilization with the package.
Ⅲ. Sterilization through ultrasonic wave. The ultrasonic wave will cause the damage of bearings, so the quality of handpiece can not be maintained.