What is the working principle of high-speed dental handpiece?
Cartridge is the core component of a high-speed dental handpiece.
The role of a cartridge of high-speed dental handpiece
Cartridge is the core component of a high-speed dental handpiece. It consists of a bur clamping mechanism, a turbine mechanism that drives the bur and a precision miniature high-speed bearing. The stability of the cartridge affects the performance of the whole machine and is also the most vulnerable in the high-speed dental handpiece.
The most important requirement for the consumable parts is that the bur clamping mechanism should be easy and reliable. (That is, when changing the bur easily, the bur is firm when working), the bearing is fixed by O-rings, which can reduce the noise of the high-speed dental handpiece and prolong the service life of the bearing.
The cartridge uses nylon pads and steel pads in the axial direction. And the disc spring adjusts the bearing pre-tightening force to make the bearing meet the working requirements.
The working principle of high-speed dental handpiece
The working principle of the high-speed dental handpiece is similar to a windmill. Flowing air with a certain pressure enters the air hole along the main airway. The high-speed airflow generates thrust on the impeller blades, which makes the impeller drive the spindle to rotate at a high speed.
The bur is clamped by the spindle, and the spindle is tightly connected with the impeller, so the rotation of the impeller drives the bur to rotate synchronously, which is used to cut the tooth to remove caries, or to prepare porcelain teeth. It can also be used for polishing dentures (but don’t use too much force, otherwise the dental handpiece will be destroyed), and the residual air after work is discharged out of the dental handpiece.
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