Association for the Advancement of Musculoskeletal
대리인 / 주소
Farber LLC
인용정보
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0인용 특허 :
19
초록▼
A bone plate for the compression of a fracture site or osteotomy of a bone includes a bone plate body having a plurality of screw holes and bone screws accommodated in the screw holes. At least one of the screw holes is teardrop shaped having a wide portion and a narrow portion. The bone screw selec
A bone plate for the compression of a fracture site or osteotomy of a bone includes a bone plate body having a plurality of screw holes and bone screws accommodated in the screw holes. At least one of the screw holes is teardrop shaped having a wide portion and a narrow portion. The bone screw selected for use in the screw hole can be either a locking screw or a non-locking screw, as the screw hole can accept both types.
대표청구항▼
1. A bone plate for the compression of a bone fracture or osteotomy, comprising: a plate body with an upper surface, a bone contacting lower surface, and at least one screw hole extending between the upper surface and the lower surface, the at least one screw hole having a smooth contoured opening a
1. A bone plate for the compression of a bone fracture or osteotomy, comprising: a plate body with an upper surface, a bone contacting lower surface, and at least one screw hole extending between the upper surface and the lower surface, the at least one screw hole having a smooth contoured opening at the upper surface that is wider than an opening at the lower surface, the at least one screw hole including a main chamber extending into a narrower portion to form a teardrop shaped screw hole opening, the main chamber including a partial circular hole having a beveled edge extending from the upper surface, and the narrower portion extending from the main chamber along a longitudinal axis of the plate body in a direction away from a mid-line axis of the plate body, the narrower portion extending into a compression notch having a smooth, rounded sidewall extending between the upper and lower surfaces, only a curved distal end of the narrower portion extending from the beveled edge to form a groove in the upper surface, the groove extending outwardly along the longitudinal axis such that the screw hole is shaped by two partially overlapping circles, the smooth contoured opening of the at least one screw hole further having a substantially circular shape at the upper-most surface of the plate body;wherein the at least one screw hole is configured to accept a locking bone screw or a non-locking bone screw, the at least one screw hole further being configured to affect axial compression when the bone screw is fully engaged. 2. The bone plate of claim 1, wherein the beveled edge is configured to engage a head of the bone screw. 3. The bone plate of claim 1, wherein the main chamber has a threaded side extending from the bone-contacting lower surface, the threaded side being configured to engage a threaded shaft of the bone screw. 4. The bone plate of claim 3, wherein the screw hole is conical. 5. The bone plate of claim 1, wherein the narrower portion is non-threaded. 6. The bone plate of claim 1, wherein the screw hole is configured to affect fixed angle fixation at the same time as axial compression when used with a locking screw. 7. The bone plate of claim 1, further including a plurality of screw holes. 8. The bone plate of claim 7, wherein the screw holes are equidistantly space relative to a mid-line axis of the bone plate. 9. The bone plate of claim 7, wherein one set of screw holes is configured to face in a directionally opposite direction to another set of screw holes. 10. A bone plate system for the compression of a bone fracture or osteotomy, comprising: a bone plate having a plate body with an upper surface, a bone contacting lower surface, and at least one screw hole extending between the upper surface and the lower surface, the at least one screw hole having a smooth contoured opening at the upper surface that is wider than an opening at the bone-contacting lower surface, the smooth contoured opening of the at least one screw hole further having a substantially circular shape at the upper-most surface of the plate body, the at least one screw hole including a main chamber extending into a narrower portion to form a teardrop shaped screw hole opening, the main chamber including a partial circular hole having a beveled edge extending from the upper surface, and the narrower portion extending from the main chamber along a longitudinal axis of the plate body in a direction away from a mid-line axis of the plate body, the narrower portion further extending into a compression notch having a smooth, rounded sidewall extending between the upper and lower surfaces, only a curved distal end of the narrower portion extending from the beveled edge to form a groove in the upper surface, the groove extending outwardly along the longitudinal axis such that the screw hole is shaped by two partially overlapping circles, the at least one screw hole being configured to accept a locking bone screw or a non-locking bone screw, the at least one screw hole further being configured to affect axial compression when the bone screw is fully engaged; anda bone screw comprising a tapered head extending into an elongated shaft and terminating in a tip, the elongated shaft including threads and the tapered head having a contoured underside. 11. The system of claim 10, wherein beveled edge is configured to contact the underside of the bone screw and angularly urge the screw during insertion. 12. The system of claim 10, wherein the tapered head of the bone screw includes threads. 13. The system of claim 12, wherein the main chamber includes a threaded side for engaging the threads of the tapered head of the bone screw during insertion. 14. The system of claim 10, wherein the contoured underside of the bone screw is smooth. 15. The system of claim 10, further including a drill guide instrument comprising a handle, an elongated shaft, and a guide plate, the guide plate having a teardrop shaped opening that complements the shape and size of the at least one screw hole.
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