Implant arrangement with an internal socket for a turning tool

Abstract

An implant is provided with an upper portion in which an internal socket extends. The implant ( 12 ) can be tightened by means of a turning instrument ( 11 ) which has first lateral surfaces ( 14 ) that can cooperate with corresponding second lateral surfaces ( 15 ) in the internal socket. One or more of the first and/or second lateral surfaces is/are arranged completely or partially with friction-enhancing means ( 16 ). The implant and the tool are arranged with interacting parts which extend beyond the first and second lateral surfaces and completely or substantially take up bending moments (M, M′) which act in or on said portion or are directed toward said portion and occur in the event of skewing, or a tendency toward skewing, between the implant and the tool. The arrangement counteracts mechanical stresses in said portion, the latter being able to retain its original shape even in the case of implants with small dimensions.

1 . A dental implant assembly for counteracting stress in a portion of the dental implant assembly, the assembly comprising a dental implant provided with an internal socket, a turning instrument which is configured to engage the internal socket and to turn the dental implant, wherein the turning instrument has first lateral surfaces ( 14 ) that can cooperate with corresponding second lateral surfaces in the internal socket, and wherein 
 one or more of the first or second surfaces are provided with means for enhancing friction between the turning instrument and the internal socket; or wherein    the dental implant and the turning instrument comprise interacting parts which extend inside the dental implant and beyond the first and second lateral surfaces, the interacting parts being configured to take up bending moments between the dental implant and the turning instrument.    
   
   
       2 . (canceled)  
   
   
       3 . The dental implant assembly as in  claim 1 , wherein a cross section through the lateral surfaces have non-round geometries.  
   
   
       4 . The dental implant assembly as in  claim 1 , wherein the means for enhancing friction between the turning instrument and the internal socket comprises a friction-enhancing coating on the first lateral surfaces.  
   
   
       5 . The dental implant assembly as in  claim 1 , wherein the means for enhancing friction between the turning instrument and the internal socket comprises a friction-enhancing coating on the second lateral surfaces.  
   
   
       6 . The dental implant assembly as in  claim 1 , wherein the means for enhancing friction between the turning instrument and the internal socket comprises a chosen degree of roughness on the lateral surfaces.  
   
   
       7 . The dental implant assembly as in  claim 1 , wherein interaction between the first and second lateral surfaces is configured to take place only when a degree of loading or degree of turning of the dental implant and the turning instrument tool is reached.  
   
   
       8 . The dental implant assembly as in  claim 1 , wherein materials which interact during turning, are configured to enhance friction.  
   
   
       9 . The dental implant assembly as in  claim 1 , wherein the means for enhancing friction between the turning instrument and the internal socket comprises a metal nitride and/or metal carbide, applied to the lateral surfaces.  
   
   
       10 . The dental implant assembly as in  claim 1 , wherein the means for enhancing friction between the turning instrument and the internal socket comprises diamond particles applied to the lateral surfaces.  
   
   
       11 . The dental implant assembly as in  claim 9 , wherein titanium nitride is applied and arrangeme stress between the dental implant and the turning instrument is reduced by up to about 30%.  
   
   
       12 . The dental implant assembly as in  claim 1 , wherein the part of the tool extending beyond the first surfaces is about 3 to 5 times longer than the longitudinal length the first lateral surfaces.  
   
   
       13 . The dental implant assembly as in  claim 1 , wherein that the part of the tool extending beyond the first surfaces has first and second longitudinally extending parts with different diameters, the first longitudinally extending part situated next to the first lateral surfaces having a greater diameter than the second longitudinally extending parts.  
   
   
       14 . The dental implant assembly as in  claim 13 , wherein a bending moment which occurs in the event of skewing between the dental implant and the turning instrument tool places a load on surface areas of the dental implant which are located at the first longitudinal extending part's area nearest to the first lateral surfaces, and the outermost part of the second longitudinally extending part, which bending moment is prevented from acting on the portion with the internal socket by a slight clearance that is initially present between the first and second lateral surfaces.  
   
   
       15 . The dental implant assembly as in  claim 14 , wherein threads parts of the implant which bear said threads take up said bending moments.