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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0354441 (2003-01-30) |
| 등록번호 | US-7341591 (2008-03-11) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 469 인용 특허 : 143 |
An anterior buttress staple and screw system is provided that can be used to hold an implant such as a disc prosthesis in place and thereby prevent its migration out of the spinal column. The buttress staple comprises a screw locking plate having a screw locking design that prevents the screw from b
An anterior buttress staple and screw system is provided that can be used to hold an implant such as a disc prosthesis in place and thereby prevent its migration out of the spinal column. The buttress staple comprises a screw locking plate having a screw locking design that prevents the screw from backing up and away from the plate. The screw is configured to provide an interference fit with the screw locking plate, and can be used as a staple removal tool during revision surgery when the screw locking plate needs to be lifted from the bone surface on which it is attached.
What is claimed is: 1. A buttress staple for preventing the migration of an implant, comprising: a screw locking plate including a first surface, a second, bone-contacting surface opposed to the first surface, and a resilient aperture having a depth extending from the first surface to the second su
What is claimed is: 1. A buttress staple for preventing the migration of an implant, comprising: a screw locking plate including a first surface, a second, bone-contacting surface opposed to the first surface, and a resilient aperture having a depth extending from the first surface to the second surface, the resilient aperture in the form of a circle or oval having a predefined size in a normal, unexpanded condition, and being configured to expand and contract to receive a screw; a slit formed in a portion of the plate and extending through a perimeter of the resilient aperture the slit configured to allow the resilient aperture to expand and contract throughout the depth of the resilient aperture; and an anchoring post extending from the second, bone-contacting surface and configured for insertion into bone. 2. The staple of claim 1, wherein the slit terminates in a relief hole. 3. The staple of claim 2, wherein the relief hole is an aperture configured to receive a screw. 4. The staple of claim 1, wherein the resilient aperture includes a countersink on the first surface of the plate. 5. The staple of claim 1, wherein the anchoring post is tapered. 6. The staple of claim 1, wherein the anchoring post includes surface features for engagement with bone. 7. The staple of claim 6, wherein the surface features include sharp edges. 8. The staple of claim 7, wherein there are a plurality of anchoring posts. 9. The staple of claim 1, wherein the plate is bent with respect to a longitudinal axis thereof, and curved with respect to a transverse axis thereof. 10. The staple of claim 1, wherein the plate is defined by sidewalls connected by endwalls. 11. The staple of claim 10, wherein a midsection of each of the sidewalls extends towards a central region of the plate. 12. The staple of claim 10, wherein a midsection of each of the endwalls extends towards a central region of the plate. 13. The staple of claim 1, wherein the plate has a substantially bow tie-like shape. 14. A buttress staple and screw system for preventing the migration of an implant, comprising: a buttress staple including a first surface, a second, bone-contacting surface opposed to the first surface, a resilient aperture having a depth extending from the first surface to the second surface, the resilient aperture having a predefined shape and size, and being adapted to expand and contract to receive a screw the resilient aperture leading into a slit, the slit extending through the first and second surfaces, the slit configured to allow the resilient aperture to expand and contract throughout a depth of the resilient aperture, and an anchoring post extending from the second, bone-contacting surface and configured for insertion into bone; and a screw configured to be inserted into bone, the screw having a head region at a proximal end, the head region being configured to be secured within the resilient aperture, and an elongated body extending from the head region to a distal end of the screw, the elongated body including a threaded portion and a contact band extending around a circumference of the screw and being disposed proximal to a proximal-most thread, the contact band having a diameter that is greater than a diameter of the resilient aperture in a non-expanded condition. 15. The system of claim 14, wherein the slit terminates in a relief hole. 16. The system of claim 14, wherein the relief hole is an aperture configured to receive a screw. 17. The system of claim 14, wherein the predefined shape of the resilient aperture is selected from the group consisting of a circular hole and an oblong slot. 18. The system of claim 14, wherein the resilient aperture includes a countersink on the first surface of the buttress staple. 19. The system of claim 14, wherein the anchoring post is tapered. 20. The system of claim 14, wherein the anchoring post includes surface features for engagement with bone. 21. The system of claim 20, wherein the surface features include sharp edges. 22. The system of claim 21, wherein there are a plurality of anchoring posts. 23. The system of claim 14, wherein the plate is bent with respect to a longitudinal axis thereof, and curved with respect to a transverse axis thereof. 24. The system of claim 14, wherein the plate is defined by sidewalls connected by endwalls. 25. The system of claim 24, wherein a midsection of each of the sidewalls and endwalls extends towards a central region of the buttress staple. 26. The system of claim 14, wherein the head region of the screw includes a top flange and a groove extending about the circumference of the head region, with the contact band being disposed therebetween. 27. The system of claim 26, wherein the contact band provides an interference fit with the resilient aperture.
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