Arrangement and implant for replacing surfaces that are subject to stresses

Abstract

The invention relates to an implant for partially replacing surfaces that are subject to stresses, especially the surfaces of a joint. Said implant comprises a spherical or axial, preferably cylindrical base to be inserted in an area removed from the bone, e.g. a punched or drilled area. The base comprises at least one surface for replacing the section to be replaced and/or an adapter for receiving an element carrying the section, e.g. a joint surface element, tooth or pivot tooth. The system for inserting the implant comprises an angle determination system in the form of elliptical plates of different diameter and cutting angle to be placed onto the joint section to be restored to determine the angle and/or the size of the substitute material to be implanted, an angle guiding device comprising a fixing extension to be inserted between the joint surfaces, and an angle adjusting device linked with the fixing extension and comprising at least one guide element whose angle can be adjusted or which can be disposed in an angle-defined position, for placing at least one guide wire in the operation field or bore guide for a tubular drill. The system further comprises a drill system that comprises at least one drill/punch that can be guided through the bore guide. Said bore guide is held in a fixed relative position to the joint section to be restored either by the angle adjusting device or by the guide wire. The invention further relates to an angle determining system in the form of elliptical plates, an oscillation drill device and hollow cylinder drills or punches having a beveled tip.

1 . An implant for partial replacement of stressed surfaces, particularly joint surface sections, including a base comprising one of an approximately spherical, axial, and cylindrical form for use in an area from which bone has been removed, which base has at least one of a surface for replacing the surface section to be replaced and an adapter for receiving an element supporting the surface section, the element comprising one of a joint surface element, tooth and pin. 
     
     
         2 . The implant as claimed in  claim 1 , characterised in that the base is cylindrical. 
     
     
         3 . The implant as claimed in  claim 2 , characterised in that the base has one of a first frontal surface and a peripheral area, which includes one of a straight, curved or shaped first surface extending at an angle preferably less than 90 degrees as the joint replacement surface and an adapter for receiving a corresponding surface replacement element. 
     
     
         4 . The implant as cited in either claimed in  claim 2 , characterised in that the base includes at least a second frontal surface, which has one of a straight, curved and shaped second surface for closing with a bone periphery. 
     
     
         5 . The implant as claimed in  claim 1 , the implants comprising a unitary one piece construction. 
     
     
         6 . The implant as claimed in  claim 1  characterised in that the base is made from an implant material or bone replacement material and is connected or connectable with a joint surface replacement base that is preferably made from a material suitable for artificial joints, comprising one of ceramic and titanium alloys. 
     
     
         7 . The implant as claimed in  claim 1  characterised in that the diameter of the base is only a minimum amount larger than that of the punching or drilling area. 
     
     
         8 - 20 . (canceled)