Patent Application
20070287129
The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
The screw implant 1 according to the invention is preferably provided with an abutment 2, and has a break point 4 with a reduced profile cross-section in the vicinity of the abutment head 3. The profile cross-section of this break point 4 is chosen so that any break that can be caused, for example, by occurrence of elevated torque on inserting the screw implant 1 occurs at this break point 4, before a break occurs in the vicinity of the bendable neck section 8 with a reduced profile cross section.
The break point 4 is preferably in the vicinity of the key surfaces 9 which accept a suitable tool for screwing in the screw implant 1. The break point 4 is arranged so that the key surfaces 9 extending from the head area 10 of the abutment head continue below the break point 4 and end between the bendable neck section 8 and the break point 4.
In case of a break, the insertion tool can be placed on the remaining key surfaces 9 below the break point 4 and the broken screw implant 1 can be unscrewed out of the implant bed in a relatively simple way.
The reduced profile cross-section of the bendable neck section 8 forms a bending zone with a previously established bending line, which is marked on the head surface of the implant and is determined by the selected profile in the bending zone. According to the present invention, the bending zone has an elliptical profile or the form of a bar 13, which can, for example, be produced by milling. The longitudinal axes of this profile form the bending lines 10; 11, which are indicated by the mark 9 in the head surface 8, indicating the preferred direction of bending for subsequent bending operations, in which the danger of breakage of the profile cross-section in the bending zone is a minimum because of the design of the profile cross-section according to the invention.
The implant base that is to be held by the jawbone is formed of a foot section which consists of a cylindrical foot segment 5 and a conical foot segment 6. As a deviant from the design shown, the foot section can also be made up of an over-all conical foot section 6. Both the cylindrical and the conical foot sections are provided with a thread 16 for screwing the implant 1 into the jawbone.
The implant base ends at an end section 7, which connects to the conical foot section through a breakpoint 15 and which can, if necessary, be separated from the remaining body of implant 1 at breakpoint 15.
The enossal surface of the implant is preferably provided with a microporous surface structure by known processes, and after cleaning of the implant, an adherent water-soluble or fat-soluble ibandronate solution is also applied, so that the active substance occurs at a dosage of 3 to 8 mg in the coating on the enossal surface of the implant.
In the absence of the microporous surface structure, the adherent water-soluble or fat-soluble ibandronate solution of the stated dosage can also be applied directly onto the enossal surface of the implant. This coating is preferably applied to the enossal surface immediately before insertion of the implant, and the implant is inserted into the prepared cavity after the applied coating has dried.
As various modifications could be made to the exemplary embodiments, as described above with reference to the corresponding illustrations, without departing from the scope of the invention, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20 2006 006 920.8 | Apr 2006 | DE | national |
