Device for the resection of bones, method for producing such a device, endoprosthesis suited for this purpose and method for producing such an endoprosthesis
View Patent ↗The present invention refers to a device for the resection of bones ( 1 ) for preparing the attachment of an endoprosthesis to the joints which consists of at least two joint elements cooperating with each other, comprising at least one tool guide ( 3, 4, 5, 7, 14 ) and at least one support ( 6, 9, 10, 15, 21 ) suitable for orienting the at least one tool guide ( 3, 4, 5, 7, 14 ), wherein, either in the immediate vicinity of the joint and/or across joints, the at least one support ( 15, 21 ) enables the at least one tool guide ( 3, 4, 5, 7, 14 ) to be oriented and positioned on a further joint element, or enables the at least one tool guide ( 3, 4, 5, 7, 14 ) to be oriented and positioned at the same joint element distally to the area to be treated and/or outside the surgical area. The at least one tool guide ( 3, 4, 5, 7, 14 ) and the at least one support are preferably immovably connected to each other so as to manufacture an individual single-use template. The invention also relates to a method for manufacturing such a device or template, an endoprosthesis suited for this purpose, a method for manufacturing such an endoprosthesis, and a surgical set consisting of said parts.
1. A device for preparing a bone for an implant comprising:
a support portion comprising a plurality of elongate elements shaped as a reproduction according to corresponding elongate surface structures of the bone from a three-dimensional image of the bone, the plurality of elongate elements arranged to form at least one viewing opening through the device between adjacent elongate elements; and
a tool guide portion attached to the support portion, the tool guide portion including a first tool guide oriented and positioned by the support portion to prepare an area of the bone for receiving an implant.
2. The device of claim 1 , wherein the plurality of elongate elements includes a first plurality of spaced-apart sagittal elements and a second plurality of spaced-apart coronary elements forming a grid.
3. The device of claim 2 , wherein the first tool guide includes a planar surface configured to guiding a resection of the bone along a plane for receiving an implant.
4. The device of claim 2 , wherein the tool guide portion includes a plurality of tool guides.
5. The device of claim 2 , wherein the tool guide portion includes a second tool guide configured for guiding fixation elements.
6. The device of claim 2 , wherein the device is a tibial template and further comprising a support surface for a tibial bone, the support surface spaced apart from the support portion and attached to the support portion with an elongated bridge element.
7. The device of claim 2 , wherein the device is a femoral template and includes a pair of lateral brackets supporting the coronary elements.
8. The device of claim 2 , wherein the device is a tibial template and the support portion is shaped as a reproduction of a femoral knee implant.
9. The device of claim 2 , wherein the sagittal elements are substantially parallel.
10. The device of claim 2 , wherein the coronary elements are substantially parallel.
11. The device of claim 2 , wherein the sagittal elements are substantially parallel and perpendicular to the coronary elements.
12. A device for preparing a bone for an implant, comprising:
a support portion including a plurality of elongate elements shaped as a reproduction according to corresponding elongate surface structures of the bone from a three-dimensional image of the bone, the plurality of elongate elements arranged to form cavities that can engage anatomy of the bone and that can be flexed;
a first tool guide portion including a first coronary tool guide and a second coronary tool guide, the first and second coronary tool guides parallel to each other and configured to cut a coronary area of the bone;
a second tool guide portion including a first canthomeatal tool guide and a second canthomeatal tool, the first and second canthomeatal tool guides acutely angled with respect to each other; and
a third tool guide portion that is perpendicular to the first tool guide.
13. The device of claim 12 , wherein the support portion, the first tool guide portion, the second tool guide portion, and the third tool guide are integrally formed.
14. The device of claim 12 , wherein the support portion has a grid-shaped structure.
15. The device of claim 12 , wherein the plurality of elongate elements includes a first plurality of spaced-apart sagittal elements and a second plurality of spaced-apart coronary elements forming a grid.
16. The device of claim 12 , wherein the first coronary guide defines a first tool path and the second coronary tool guide defines a second tool path, the first tool path parallel to the second tool path.
17. The device of claim 16 , wherein the first canthomeatal tool guide defines a third tool path and the second canthomeatal tool guide includes a fourth tool path, the third and fourth tool path acutely angled with respect to each other.
18. The device of claim 17 , wherein the third tool guide portion defines a fifth tool path that is perpendicular to the first and second tool paths.
19. The device of claim 1 , wherein the tool guide further comprises a viewing opening to allow the at least some of the plurality of elongate elements to be viewed through the tool guide.
20. The device of claim 12 , wherein each of the plurality of elongate elements is elastic.