Patent ID: 8539848

Claim:
A system for evaluating cutting efficiency of root canal rotary instruments, comprising: a root canal rotary instrument; a driving unit, wherein the root canal rotary instrument is attached on the driving unit, and driven thereby; a cutting object; a prestressing force providing unit, wherein the cutting object is pressed by the prestressing force providing unit to contact the root canal rotary instrument; and a feeding unit arranged to feed the cutting object to the root canal rotary instrument, such that the root canal rotary instrument cuts an uncut surface of the cutting object, wherein the driving unit comprises a contra-angle handpiece, the root canal rotary instrument is disposed on the contra-angle handpiece, and the root canal rotary instrument is driven by the contra-angle handpiece, wherein the driving unit further comprises a first sliding member, the contra-angle handpiece is disposed on the first sliding member, the first sliding member slides in a first direction and a second direction to modify a position of the root canal rotary instrument, and the first direction is perpendicular to the second direction, wherein the cutting object comprises a first cylinder, and the feeding unit rotates the first cylinder.