IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0115437
(2011-05-25)
|
등록번호 |
US-8864802
(2014-10-21)
|
우선권정보 |
EP-10005423 (2010-05-25) |
발명자
/ 주소 |
- Schwager, Manuel
- Sylvestre, Pierre-Luc
- Wider, Robert
|
출원인 / 주소 |
|
대리인 / 주소 |
Lerner, David, Littenberg, Krumholz & Mentlik, LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
An implant for use in orthopedic surgery for fixation of bone has a shaft region and a head region, both including a plurality of holes for receiving bone fasteners. The head region of the implant has a central screw hole and threaded surrounding screw holes surrounding the central screw hole in a d
An implant for use in orthopedic surgery for fixation of bone has a shaft region and a head region, both including a plurality of holes for receiving bone fasteners. The head region of the implant has a central screw hole and threaded surrounding screw holes surrounding the central screw hole in a defined configuration.
대표청구항
▼
1. An implant, comprising a shaft region having one or more holes for receiving bone fasteners; anda head region extending from the shaft region and having a plurality of circular holes for receiving bone fasteners, the plurality of circular holes including an unthreaded central screw hole having a
1. An implant, comprising a shaft region having one or more holes for receiving bone fasteners; anda head region extending from the shaft region and having a plurality of circular holes for receiving bone fasteners, the plurality of circular holes including an unthreaded central screw hole having a center and at least three threaded locking screw holes each having a center and surrounding the central screw hole, wherein the centers of the locking screw holes define a polygon and wherein the center of the central screw hole is located on or within the polygon,wherein the central screw hole comprises a part-spherical or conical hole portion on a side opposite the bone contacting side of the implant; anda targeting hole located intermediate two of the threaded locking screw holes, the targeting hole having grooves extending substantially radially therefrom on the side opposite the bone contacting side for stabilizing a targeting instrument. 2. The implant according to claim 1, wherein each locking screw hole includes a locking structure adapted to lock a bone fastener to the implant. 3. The implant according to claim 2, wherein the locking structure includes a threaded portion or a circumferential lip adapted to engage the bone fastener. 4. The implant according to claim 1, wherein the shaft region is shaped to conform to an extra-articular part of a bone and the head region is shaped to conform to a periarticular part of the bone. 5. The implant according to claim 1, wherein the central screw hole has a first diameter and each of the locking screw holes has a second diameter, wherein the first diameter is greater than the second diameter. 6. The implant according to claim 1, wherein the central screw hole is located in a central portion of the head region and wherein the locking screw holes surround the central screw hole such that a distance between the center of the central screw hole and the center of each of the locking screw holes does not exceed three times a diameter of the central screw hole. 7. The implant according to claim 1, wherein the central screw hole is located in a central portion of the head region such that a shortest distance between the center of the central screw hole and a polygon portion defined by two neighbouring locking screw holes is between 1 mm and 15 mm. 8. The implant according to claim 1, wherein an angular distance between each pair of neighboring locking screw holes relative to an axis through the center of the central screw hole does not exceed 170°. 9. The implant according to claim 8, wherein the angular distance does not exceed 120°. 10. The implant according to claim 1, wherein the central screw hole comprises a cylindrical hole portion on a bone contacting side of the implant and a curved or conical hole portion on a side opposite to the bone contacting side. 11. The implant according to claim 1, wherein at least one of the locking screw holes comprises a threaded hole portion on a bone contacting side of the implant and an unthreaded hole portion on a side opposite to the bone contacting side. 12. The implant according to claim 11, wherein the threaded hole portion tapers inwardly toward a bone contacting surface of the implant. 13. The implant according to claim 11, wherein the unthreaded hole portion has an inward taper having a curved or conical shape. 14. The implant according to claim 1, wherein the shaft portion further includes an oblong hole. 15. The implant according to claim 1, wherein the head region further includes at least one K-wire hole for receiving a K-wire, wherein a diameter of the K-wire hole is smaller than a diameter of each of the central screw hole and the locking screw holes. 16. The implant according to claim 1, wherein the targeting hole comprises a targeting structure for receiving a targeting instrument. 17. The implant according to claim 1, wherein at least one hole has a central axis which is oblique relative to a vertical axis of the implant. 18. The implant according to claim 1, wherein the locking screw holes are adapted to receive cortical screws for fixing the implant to bone. 19. An implant system comprising an implant witha shaft region having one or more holes for receiving bone fasteners; anda head region extending from the shaft region and having a plurality of circular holes for receiving bone fasteners, the plurality of circular holes including a central screw hole having a center and at least three locking screw holes each having a center and surrounding the central screw hole, wherein the centers of the locking screw holes define a polygon and wherein the center of the central screw hole is located on or within the polygon;a compression screw adapted to be inserted into the central screw hole;wherein the central screw hole comprises a part-spherical or conical hole portion on a side opposite the bone contacting surface;at least three locking screws or cortical screws adapted for a locking engagement with the locking screw holes; anda targeting hole located intermediate two of the locking screw holes, the targeting hole having grooves extending substantially radially therefrom on the side opposite the bone contacting side for stabilizing a targeting instrument. 20. The implant system according to claim 19, wherein each locking screw hole includes a locking structure adapted to lock a bone fastener to the implant. 21. The implant system according to claim 19, wherein the implant further comprises an oblong hole for receiving a further compression or locking screw. 22. The implant system according to claim 19, wherein the targeting hole comprises a targeting structure for receiving a targeting instrument. 23. A system comprising an implant witha shaft region having one or more holes for receiving bone fasteners; anda head region extending from the shaft region and having a plurality of circular holes for receiving bone fasteners, the plurality of circular holes including a central screw hole having a center and at least three locking screw holes each having a center and surrounding the central screw hole, wherein the centers of the locking screw holes define a polygon and wherein the center of the central screw hole is located on or within the polygonwherein the central screw hole comprises a part-spherical or conical hole portion on a side opposite the bone contacting surface;a targeting instrument adapted to be secured to the implant;wherein the head region of the implant further includes at least one targeting structure for receiving the targeting instrument, and wherein a portion of the targeting instrument is adapted to be fixedly secured to the targeting structure of the implant; andwherein the targeting structure comprises a targeting hole located intermediate two of the locking screw holes and grooves extending substantially radially from the targeting hole for stabilizing the targeting instrument. 24. The system according to claim 23, wherein the head region of the implant further includes at least one targeting structure for receiving the targeting instrument, and wherein a portion of the targeting instrument is adapted to be fixedly secured to the targeting structure of the implant. 25. The system according to claim 23, wherein the targeting instrument includes a plurality of guide holes for guiding bone fasteners, drilling instruments or guiding instruments. 26. An implant, comprising: a shaft region having one or more holes for receiving bone fasteners; anda head region extending from an end of the shaft region and having five threaded locking screw holes for receiving bone fasteners having threaded heads, the five threaded holes surrounding an unthreaded central screw hole having a center and the five locking screw holes each having a center surrounding the unthreaded central screw hole, wherein the centers of the locking screw holes define a polygon and wherein the center of the unthreaded central screw hole is located on or within the polygon and further comprising a sixth threaded hole spaced from the central screw hole and located intermediate two of the threaded locking screw holes for receiving a targeting instrument, the implant having a bone-contacting surface and an opposite outwardly facing surface with the five threaded holes, the unthreaded central hole and the sixth threaded hole extending from the bone-contacting surface to the outwardly facing surface, the sixth threaded hole having grooves for positioning the targeting instrument extending radially outwardly therefrom along the outwardly facing surface.
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