Apparatus for explanting a dental implant from a human or animal bone

Abstract

Example apparatus for explanting a dental implant from a human or animal bone are disclosed herein. In one example, the apparatus includes a trephine bur on an end side of which there is formed a bur bit. In one or more examples, an apparatus by which dental implants can be drilled out accurately is achieved by a guide pin that can be attached to the dental implant and by a guide element attached to the trephine bur, said guide element cooperating with the guide pin so that the trephine bur is guided in the axial direction of the guide pin.

1 . An apparatus comprising:
 a trephine bur;   a bur bit on an end of the trephine bur;   a guide pin attachable to a dental implant; and   a guide element attached to the trephine bur, the guide element cooperating with the guide pin to guide the trephine bur in an axial direction of the guide pin.   
     
     
         2 . The apparatus of  claim 1 , wherein the guide element is a hollow cylinder having a width substantially corresponding to a diameter of the guide pin. 
     
     
         3 . The apparatus of  claim 1  further comprising a plurality of webs to retain the guide element in the trephine bur. 
     
     
         4 . The apparatus of  claim 3 , wherein the plurality of webs comprises three to eight webs. 
     
     
         5 . The apparatus of  claim 1 , wherein the guide pin is to extend into the guide element when the trephine bur fits against a jaw bone. 
     
     
         6 . The apparatus of  claim 1 , wherein a distance between the guide elements and the bur bit substantially corresponds to a length of the dental implant. 
     
     
         7 . The apparatus of  claim 1 , wherein a distance between the guide element and the bur bit corresponds at least to a length of the dental implant. 
     
     
         8 . An apparatus comprising:
 a trephine bur;   a bur bit on an end of the trephine bur; and   a guide cylinder attachable to a dental implant, the guide cylinder comprising a first cylindrical guide surface having a first outer diameter corresponding an inner diameter of the trephine bur.   
     
     
         9 . The apparatus of  claim 8 , the guide cylinder further comprising a second guide surface spaced axially from the first guide surface. 
     
     
         10 . The apparatus of  claim 9 , the guide cylinder further comprising a groove between the first and second cylindrical guide surfaces. 
     
     
         11 . The apparatus of  claim 10 , wherein the groove is rounded. 
     
     
         12 . The apparatus of  claim 9 , wherein the second guide surface has a second outer diameter substantially equal to the first outer diameter. 
     
     
         13 . The apparatus of  claim 8 , wherein the guide cylinder is to be fixed in the dental implant. 
     
     
         14 . The apparatus of  claim 8 , wherein the guide cylinder comprises an extension to penetrate the dental implant. 
     
     
         15 . The apparatus of  claim 8 , wherein an interior wall of the trephine bur is to engage the guide cylinder. 
     
     
         16 . The apparatus of  claim 8  further comprising a bur reception mount to drive the trephine bur. 
     
     
         17 . The apparatus of  claim 8  further comprising a thread to fasten the guide cylinder to the implant. 
     
     
         18 . The apparatus of  claim 8 , wherein the inner diameter of the trephine bur corresponds to a diameter of the implant. 
     
     
         19 . The apparatus of  claim 8 , wherein the inner diameter of the trephine but is larger than a diameter of the implant. 
     
     
         20 . The apparatus of  claim 8 , wherein the guide cylinder has a lower end that has a diameter substantially corresponding to a diameter of an adjacent end of the implant.