Dental Implant

Abstract

The invention relates to a dental implant comprising an implant body providing with a central receiving opening, a structural element provided with a journal engaging in the receiving opening, and a tension bolt which penetrates a borehole of the structural element and is screwed into an inner thread located in the receiving opening. First and second indexing elements are arranged in an apical region of the structural element, in order to pre-define the rotational position of the structural element in relation to the implant body. The at least one first indexing element is associated with the implant body or the structural element in a rotationally fixed manner, and at least two second indexing elements are associated with the structural element or the implant body in a rotationally fixed manner. The indexing elements extend especially at least partially into the region of the conical outer surface of the journal.

1 . Dental implant comprising an implant body having a central receiving opening, a structural part having a pin that engages in said receiving opening, and a tension screw that passes through a through-hole of said structural part and is screwed into an inner thread present in said receiving opening, said implant body having placement elements for a tool for placing said implant body in a jawbone, and whereby by means of a conical inner surface of said implant body and a conical outer surface of said pin adjacent thereto under tension, a cone connection is provided for anti-rotation of said structural part with respect to said implant body, wherein in an apical area of said structural part first and second indexing elements are arranged for specifying the rotation position of said structural part with respect to said implant body, whereby at least one of the first indexing elements is affixed rotation-fast to said implant body or said structural part and whereby furthermore at least two of the second indexing elements are affixed rotation-fast to said structural part or said implant body, and said indexing elements extend at least partially into the area of said conical outer surface of said pin. 
   
   
       2 . Dental implant in accordance with  claim 1 , wherein axially between said coronal end of said implant body and said apical area having said indexing elements is an annular zone in which said conical outer surface of said pin of said structural part is positioned across its entire circumference against said conical inner surface of said implant body, and/or in said apical area in a circumferential direction between said indexing elements said conical outer surface is positioned against said conical inner surface. 
   
   
       3 . Dental implant in accordance with  claim 1  or  16 , wherein said apical area is provided at a specified distance spaced apart from said coronal end of said implant body and/or said placement elements arranged there. 
   
   
       4 . Dental implant in accordance  claim 1  or  16 , wherein said indexing elements are arranged at a specified axial distance from said inner thread of said implant body and/or said outer thread of said tension screw. 
   
   
       5 . Dental implant in accordance with  claim 1 , wherein said at least one first indexing element is a rib projecting beyond one of said conical surfaces, at least two of said second indexing elements are grooves in the other of said conical surfaces and/or said ribs and grooves are arranged at an angle to a longitudinal axis of said dental implant that is substantially the same as said conical inner surface and/or said conical outer surface. 
   
   
       6 . Dental implant in accordance with  claim 1 , wherein said first indexing elements and/or said second indexing elements are integral components of said implant body and/or of said receiving part, or said indexing elements are components of a separate body that is joined rotation-fast to said implant body and/or said structural part. 
   
   
       7 . Dental implant in accordance with  claim 2 , wherein for anchoring in the jawbone, said implant body has an outer thread having an area having a shallower thread depth compared to the thread depth of the outer thread in an area apically adjacent and/or allocated to said apical end of said implant body and said radially interior indexing elements are allocated to said area of the outer thread having shallower thread depth. 
   
   
       8 . Dental implant in accordance with  claim 7 , wherein provided in the direction toward a coronal end of said implant body adjacent to said outer thread is a thread-free area and said annular zone is situated at least partially radially inward to said thread-free area and within the annular zone said conical inner surface is closed across the circumference and is positioned against said conical outer surface of said pin and/or said annular zone is arranged at least partially radially inside of the area in which said outer thread of said implant body has a shallower thread depth radially outward. 
   
   
       9 . Dental implant in accordance with  claim 8 , wherein a thread sleeve is arranged rotation-fast on the apical end of said tension screw and engages in said inner thread of said receiving opening of said implant body, and said outer diameter of said thread sleeve is larger than an inner diameter of said tension screw. 
   
   
       10 . Dental implant in accordance with  claim 1 , wherein said indexing elements are in the form of grooves in said pin and are arranged radially inside an envelope curve that is specified by the conical outer surface of said pin. 
   
   
       11 . Implant system comprising two or more dental implants in accordance with  claim 1 , wherein outer geometries said implant bodies and/or receiving elements are mutually different and on account of the central receiving opening and the pin of each of said two or more dental implants, said implant bodies and said receiving parts can be combined with one another and joined as desired. 
   
   
       12 . Implant system according to  claim 11 , further comprising, least one additional implant body that does not have any indexing element whereby said at least one structural part can be selectively joined to said first implant body having at least one of said first indexing elements or to said additional implant body. 
   
   
       13 . Implant system in accordance with  claim 12 , wherein the dental implants according to  claim 1  differ in length and/or diameter and a plurality of said second implant bodies is provided which differ in length and/or diameter. 
   
   
       14 . Implant system comprising at least one dental implant in accordance with  claim 1 , further comprising at least one additional structural part that does not have any indexing element and said implant body of said at least one dental implant can be selectively joined to said structural part, said structural part having at least one of said second indexing elements or to said additional structural part. 
   
   
       15 . Implant system in accordance with  claim 14 , wherein the structural parts of the dental implants according to  claim 1  differ in length and/or angling of head areas thereof with respect to a longitudinal axis thereof, and a plurality of second structural parts is provided that do not have any indexing elements and that differ in length and/or angling of head areas thereof with respect to the longitudinal axis thereof. 
   
   
       16 . Dental implants according to  claim 1 , wherein the placement elements are situated in an area of a coronal end of said implant body. 
   
   
       17 . Dental implants according to  claim 3 , wherein said specified distance corresponds to said length of said annular zone. 
   
   
       18 . Dental implant according to  claim 4 , wherein said specified axial distance is from the thread sleeve of said tension screw. 
   
   
       19 . Dental implant according to  claim 6 , wherein said separate body is a sleeve arranged rotation-fast in a center area of said implant body and said inner thread of said receiving opening is apically adjacent to said center area.