DENTAL INSTRUMENT FOR THE PREPARATION OF TEETH, IN PARTICULAR TOOTH ROOT CHANNELS, AND PIN FOR USE IN A PROVIDED HOLE, IN PARTICULAR A HOLE PRODUCED WITH A DENTAL INSTRUMENT ACCORDING TO THE INVENTION

摘要

The invention relates to a two-part dental instrument for the preparation of root channels for receiving rotationally asymmetrical, accurately fitting and congruently shaped root pins. The working dental instrument is provided with abrasive surfaces at its working sides and is operated in an oscillating manner. The guide thereof is ensured by a slotted sleeve which is inserted into the conical root channel. The preparation of an asymmetrical pin bed resulting therefrom secures in the case of the use of the associated congruently shaped, asymmetrical root pins the risk of rotation and thus the loss of the restoration.