Dental apparatus

Abstract

A dental equipment for cutting teeth, forming root canals and so on. The dental apparatus includes: an actuator for actuating a cutting tool; a load sensor for sensing a load worked in the cutting tool; and a load indicator for making an operator know the load sensed by the load sensor visually, aurally and/or tactily.

1 - 26 . (canceled).  
   
   
       27 : A dental apparatus comprising: 
 a driving device for driving a cutting tool;    a root canal length measuring device for measuring a root canal length; and    a control device for controlling the driving device so that a driving force of the cutting tool changes depending on a measurement value of the root canal length measured by the root canal length measuring device, wherein the control device controls `the driving device to perform one of stopping a rotation of the cutting tool; reversing the rotation thereof; decreasing a speed of the rotation thereof; and repeating forward and backward rotations thereof.    
   
   
       28 : The dental apparatus as claimed in  claim 27 , wherein the control device includes a rotation control device for controlling the driving device so that the rotation of the cutting tool changes depending on the measurement value of the root canal length measured by the root canal length measuring device.  
   
   
       29 : The dental apparatus as claimed in  claim 28 , wherein the rotation control device controls the driving device so that the rotation speed of the cutting tool changes from a reference rotation speed to a preset rotation speed depending on the measurement value of the root canal length measured by the root canal length measuring device.  
   
   
       30 : The dental apparatus as claimed in  claim 28 , wherein the rotation control device controls the driving device so that the rotation speed of the cutting tool changes from a reference rotation speed at a preset reduction rate depending on the measurement value of the root canal length measured by the root canal length measuring device.  
   
   
       31 : The dental apparatus as claimed in  claim 29 , further comprising a setting device for setting the reference rotation speed and the preset rotation speed.  
   
   
       32 : The dental apparatus as claimed in  claim 30 , further comprising a setting device for setting the reference rotation speed and the reduction rate