Implant with one piece swivel joint
An implant for permanent or temporary introduction into the human or animal body includes a base body for connecting spaced body parts and/or other implant components, the implant having a load axis, along which primarily tensile and/or compressive forces are transmissible, with at least one rotary axis formed at right angle to the load axis, the rotary axis facilitating at least limited bending of the base body about the rotary axis, especially of the ends of the base body arranged along the load axis, with the at least one rotary axis being defined by a swivel joint, which is formed in one-piece at the base body.
1. An implant for permanent or temporary introduction into a human or animal body, the implant comprising:
a base body having an outer wall surface and an inner wall surface, the base body further having a load axis along which primarily at least one of tensile and compressive forces are transmissible; and
at least one swivel joint formed in one piece with the base body, the at least one swivel joint having a rotary axis formed transversely to the load axis, said rotary axis facilitating at least limited bending of the base body about the rotary axis;
wherein the base body comprises a first ring or disc element and a second ring or disc element and wherein the at least one swivel joint comprises first and second ligaments connecting the first ring or disc element to the second ring or disk element, each of the first and second ligaments extends radially inward from the outer wall surface toward a central axis of the base body parallel to the load axis and beyond the inner wall surface of the base body;
wherein the first ring or disc element is spaced apart from the second ring or disc element along the central axis of the base body by the first and second ligaments, forming cutouts between the ligaments.
2. An implant in accordance with claim 1 , further comprising more than two ring or disc elements and several swivel joints with their rotary axes in different planes arranged transversely to the load axis.
3. An implant in accordance with claim 1 , further comprising more than two ring or disc elements and several swivel joints with rotary axes mutually rotated about the load axis.
4. An implant in accordance with claim 1 , further comprising more than two ring or disc elements and several swivel joints along the load axis in several planes lying one on top of the other, wherein the swivel joints are offset from each other by 90°.
5. An implant in accordance with claim 1 , wherein each of the first and second ligaments is a film hinge, the thickness of the firm hinge, measured in a circumferential direction around the central axis of the base body, is less than the greatest height of the cutout, measured in the direction of the central axis of the base body.
6. An implant in accordance with claim 1 , wherein the two ligaments are formed opposite each other along the rotary axis.
7. An implant in accordance with claim 6 , wherein the cutouts are arranged in a plane at a right angle to the load axis, and wherein the swivel joint is provided at a right angle to the plane of the cutouts, wherein the cutouts are arranged on both sides of the swivel joint such that tilting about the swivel joint is enabled.
8. An implant in accordance with claim 7 , wherein each cutout tapers from the corresponding swivel joint at least in a wall region of the base body.
9. An implant in accordance with claim 1 , wherein the swivel joint is arranged along a bisector of the base body.
10. An implant in accordance with claim 1 , wherein the base body has more than two disc or ring elements and several swivel joints, each disc or ring element connected to another disc or ring element by a respective swivel joint.
11. An implant in accordance with claim 10 , wherein the more than two disc or ring elements have a continuous opening arranged centrally and coaxially to the central axis along the load axis.
12. An implant in accordance with claim 11 , wherein the opening is any one of star-shaped, cross-shaped and clover-leaf-shaped.
13. An implant in accordance with claim 10 , wherein the base body has an odd number of swivel joints and an even number of disc or ring elements.
14. An implant in accordance with claim 10 , wherein the disc or ring elements are elastically deformable along the load axis.
15. An implant in accordance with claim 10 , wherein the disc or ring elements are elastically deformable along the load axis in the vicinity of the swivel joints.
16. An implant in accordance with claim 1 , wherein the base body is elastically deformable parallel to the load axis in the axial direction.
17. An implant in accordance with claim 1 , wherein the base body is formed as a tubular body with a cylindrical cross-sectional shape.
18. An implant in accordance with claim 1 , wherein the base body has a connecting element at each end, each connecting element formed by a plurality of projections arranged along the load axis.
19. An implant in accordance with claim 1 , wherein the base body has a connecting element at each end, each connecting element formed by a plurality of cutouts into the inner and outer wall surfaces of the base body.
20. An implant in accordance with claim 1 in the shape of a connecting rod to connect to pedicle screws having screw connections,
wherein the base body has connecting elements at its ends arranged along the load axis, and wherein the connecting elements are configured to be attachable to the screw connections.
21. An implant in accordance with claim 1 , further comprising lateral plate elements extending from each side of the first and second ligaments to the inner wall of the base body.
22. An implant for permanent or temporary introduction into a human or animal body, the implant comprising:
a base body having a load axis along which primarily at least one of tensile and compressive forces are transmissible; and
at least one swivel joint formed in one piece with the base body, the at least one swivel joint having a rotary axis formed transversely to the load axis, said rotary axis facilitating at least limited bending of the base body about the rotary axis;
wherein the base body comprises a first ring or disc element and a second ring or disc element and wherein the at least one swivel joint comprises first and second ligaments connecting the first ring or disc element to the second ring or disk element, each of the first and second ligaments extends radially inward from an outer wall surface toward a central axis of the base body parallel to the load axis;
wherein the first ring or disc element is spaced apart from the second ring or disc element along the central axis of the base body by the first and second ligaments, foaming cutouts between the ligaments;
wherein each of the first and second ligaments is a film hinge, the thickness of the film hinge, measured in a circumferential direction around the central axis of the base body, is less than the greatest height of the cutout, measured in the direction of the central axis of the base body.
23. An implant in accordance with claim 22 , wherein the base body has more than two disc or ring elements and several swivel joints, each disc or ring element connected to another disc or ring element by a respective swivel joint.
24. An implant in accordance with claim 23 , wherein the more than two disc or ring elements have a continuous opening arranged centrally and coaxially to the central axis along the load axis.
25. An implant in accordance with claim 22 , wherein the base body has a connecting element at each end, each connecting element formed by a plurality of projections arranged along the load axis.