Components for guided threading of bone

Abstract

In certain embodiments, a combination of a guide sleeve for a surgical template, a drill, and a thread forming tool is disclosed. The guide sleeve has a guide surface for guiding the thread forming tool. The drill has at least one cutting edge for cutting a recess in bone. The thread forming tool has a thread forming section for forming at least one thread in bone, and a guide section for guidance by the guide surface of the guide sleeve, the thread forming section comprising an apical portion, and a coronal portion. In certain embodiments, a maximum diameter of the apical portion of the thread forming section is smaller than or equal to a maximum diameter of the cutting edge of the drill.

1 . A combination of a guide sleeve for a surgical template, a drill, and a thread forming tool, the combination comprising:
 the guide sleeve having a guide surface for guiding the thread forming tool;   the drill having at least one cutting edge for cutting a recess in bone; and   the thread forming tool having a thread forming section for forming at least one thread in bone, and a guide section for guidance by the guide surface of the guide sleeve, the thread forming section comprising an apical portion, and a coronal portion; wherein   a maximum diameter of the apical portion of the thread forming section is smaller than or equal to a maximum diameter of the cutting edge of the drill.   
     
     
         2 . The combination according to  claim 1 , wherein a position of the maximum diameter of the apical portion of the thread forming section is located offset from an apical end of the thread forming section and at a first distance from an apical end of the guide section, said first distance being substantially equal to a second distance from said position to a coronal end of the guide surface when the thread forming tool is inserted into the guide sleeve. 
     
     
         3 . The combination according to  claim 2 , wherein the offset is at least about 1 mm. 
     
     
         4 . The combination according to  claim 1 , wherein an apical end of the thread forming section is larger than a maximum diameter of an apical section of the drill, the apical section of the drill smaller than a maximum diameter of a coronal section of the drill. 
     
     
         5 . The combination according to  claim 1 , wherein at least one of an apical section and a coronal section of the drill is substantially cylindrical, tapered, or cylindrical and tapered. 
     
     
         6 . The combination according to  claim 1 , wherein a diameter of the guide section of the thread forming tool is slightly smaller than a diameter of the guide surface of the guide sleeve. 
     
     
         7 . The combination according to  claim 1 , wherein the apical portion of the thread forming section is at least partially tapering outwardly from its apical end towards its coronal end. 
     
     
         8 . The combination according to  claim 1 , further comprising an implant having a bone tissue apposition surface, wherein a maximum diameter of at least an apical portion of the bone tissue apposition surface is smaller than or equal to a maximum diameter of the thread forming section of the thread forming tool. 
     
     
         9 . The combination according to  claim 1 , further comprising an implant having a bone tissue apposition surface, wherein a maximum diameter of an apical portion of the bone tissue apposition surface is larger than a maximum diameter of the apical portion of the thread forming section of the thread forming tool. 
     
     
         10 . The combination according to  claim 1 , further comprising an implant having a bone tissue apposition surface, wherein a maximum diameter of a coronal portion of the bone tissue apposition surface is larger than a maximum diameter of the coronal portion of the thread forming section of the thread forming tool. 
     
     
         11 . The combination according to  claim 8 , wherein the thread forming section of the thread forming tool comprises a helical thread with at least one cutting surface, and the bone tissue apposition surface of the implant comprises at least one helical thread. 
     
     
         12 . The combination according to  claim 11 , wherein a longitudinal cross-sectional shape of the helical thread of the thread forming section substantially corresponds to a longitudinal cross-sectional shape of the helical thread of the implant. 
     
     
         13 . The combination according to  claim 11 , wherein a dimension of the helical thread of the thread forming section along at least a portion thereof substantially corresponds to a dimension of the helical thread of the implant along at least a portion thereof. 
     
     
         14 . The combination according to  claim 11 , wherein a pitch of the helical thread of the thread forming section is substantially equal to a pitch of the helical thread of the implant. 
     
     
         15 . A method of providing threads in a recess in bone, the method comprising:
 positioning a surgical template having a guide sleeve with a guide surface at a surgical site,   inserting a drill through the guide sleeve,   drilling a recess in the bone while the drill is guided by the guide sleeve,   inserting a thread forming tool into the guide sleeve,   guiding a guide section of the thread forming tool with the guide surface of the guide sleeve before a thread forming section of the thread forming tool starts forming a thread in the recess, and   forming a thread in the bone while the guide section of the thread forming tool is guided by the guide surface.   
     
     
         16 . The combination according to  claim 3 , wherein the offset is at least about 2 mm. 
     
     
         17 . The combination according to  claim 16 , wherein the offset is in a range of about 2 mm to about 3 mm. 
     
     
         18 . The combination according to  claim 5 , wherein at least one of an apical section and a coronal section of the drill is circular cylindrical. 
     
     
         19 . The combination according to  claim 6 , wherein the diameter of the guide section of the thread forming tool is approximately 10 μm to approximately 200 μm. 
     
     
         20 . The combination according to  claim 19 , wherein the diameter of the guide section of the thread forming tool is approximately 30 μm to approximately 100 μm.