Bone plating system
The present invention relates to a bone plating system and method for fracture fixation of bone. The bone plating system includes a bone plate, at least one locking screw, and at least one non-locking screw. The bone plate has locking holes with threads and non-locking holes. The locking screws have a shaft with a thread for engaging bone and a head with a thread configured and dimensioned to mate with the thread of the locking holes. The non-locking screws have a thread for engaging bone and a non-threaded head. Both the locking and non-locking screws remain seated in their respective holes for substantially as long as the bone plate is implanted. The non-locking screws compress the bone plate against the bone and hold fracture reduction while the locking screws are secured to the plate at a fixed angular relationship. The mixed fixation achieved by this bone plating system and method is particularly useful for treatment of per-articular fractures.
1. A bone plating system for improving the stability of a bone fracture in a long bone, the bone plating system comprising:
(a) a bone plate including:
a lower surface, which when in an operative configuration, faces a bone to which the bone plate is to be attached;
an upper surface opposite the lower surface;
a shaft portion having a width and a central longitudinal axis, the shaft portion configured and dimensioned to extend along at least a portion of a diaphysis of a bone to which the bone plate is configured to be attached, and the lower surface of the shaft portion having a plurality of arched cut-outs extending transverse to the longitudinal axis, the shaft portion having a plurality of bone screw holes having a threaded, conical taper and a plurality of bone screw holes that are unthreaded; and
a head portion configured and dimensioned to extend along at least a portion of a metaphysis of the bone to which the bone plate is configured to be attached, wherein the head portion flares outward from the shaft portion so as to have a width that is greater than the width of the shaft portion, the head portion curves upward from the shaft portion and having at least three bone screw holes, and all of the bone screw holes of the head portion have a threaded, conical taper extending continuously from the upper surface to the lower surface;
(b) a plurality of locking bone screws having a threaded shaft for engaging bone and a threaded, conically-tapered head configured to threadedly mate with the threaded, conical taper of the bone screw holes of the head portion; and
(c) a plurality of non-locking bone screws having a threaded shaft for engaging bone and an unthreaded, conically-tapered head.
2. The bone plating system of claim 1 , wherein at least two of the bone screw holes in the head portion have diameters different from each other.
3. The bone plating system of claim 1 , wherein the shaft portion has a thinner cross section in regions between the bone screw holes.
4. The bone plating system of claim 3 , wherein the shaft portion has a trapezoidal shaped cross section in regions between the bone screw holes for minimizing contact between the bone and the lower surface.
5. The bone plating system of claim 1 , wherein the bone plate further comprises at least one hole for provisional fixation of the bone plate.
6. The bone plating system of claim 5 , wherein the at least one provisional fixation hole is a suture hole.
7. The bone plating system of claim 6 , wherein the suture hole is located in the head portion.
8. The bone plating system of claim 1 , wherein the threaded portion for each of the bone screw holes in the head portion comprises a double-lead thread.
9. The bone plating system of claim 1 , wherein the bone plate is configured and dimensioned for use with the tibia.
10. The bone plating system of claim 1 , wherein the bone plate is configured and dimensioned for use with the femur.
11. The bone plating system of claim 1 , wherein each of the locking bone screws has a threaded, conically tapered head.
12. The bone plating system of claim 1 , wherein at least one of the bone screw holes in the head portion has a non-perpendicular angular orientation with respect to a plane defined by the upper surface of the plate.
13. The bone plating system of claim 12 , wherein the angular orientation of the angled bone screw hole is between 5° and 15°.
14. A bone plating system configured to be implanted for improving the stability of a bone fracture in a long bone, the bone plating system comprising:
(a) a bone plate including:
a lower surface, which when in an operative configuration, faces a bone to which the bone plate is to be attached;
an upper surface opposite the lower surface;
a shaft portion having a width, the shaft portion configured and dimensioned to extend along at least a length of a diaphysis of a bone to which the bone plate is configured to be attached, the shaft portion including at least one bone screw hole has a threaded, conical taper; and
a head portion that is configured and dimensioned to extend along at least a length of a metaphysis of the bone to which the bone plate is configured to be attached, wherein the head portion flares outward from the shaft portion so as to have a width that is greater than the width of the shaft portion and which curves upward from the shaft portion, and the head portion has at least three bone screw holes, all of the bone screw holes of the head portion have a threaded, conical taper extending continuously from the upper surface to the lower surface;
(b) a plurality of locking bone screws having a threaded shaft for engaging bone and a threaded, conically-tapered head configured to threadedly mate with the threaded, conical taper of the bone screw holes of the head portion; and
(c) a plurality of non-locking bone screws having a threaded shaft for engaging bone and an unthreaded, conically-tapered head.
15. The bone plating system of claim 14 , wherein the at least one of the bone screw holes in the head portion has a non-perpendicular angular orientation with respect to a plane defined by the upper surface of the plate.
16. The bone plating system of claim 14 , wherein the shaft portion further comprises a plurality of unthreaded bone screw holes.
17. The bone plating system of claim 14 , wherein at least two of the bone screw holes in the head portion have diameters different from each other.
18. The bone plating system of claim 14 , wherein the bone plate further comprises at least one hole for provisional fixation of the bone plate to the long bone.
19. The bone plating system of claim 18 , wherein the at least one provisional fixation hole is a suture hole.
20. The bone plating system of claim 19 , wherein the suture hole is located in the head portion.
21. The bone plating system of claim 14 , wherein the threaded portion for each of the bone screw holes in the head portion comprises a double-lead thread.
22. The bone plating system of claim 14 , wherein the bone plate is configured and dimensioned for use with the tibia.
23. The bone plating system of claim 14 , wherein the bone plate is configured and dimensioned for use with the femur.
24. The bone plating system of claim 14 , wherein at least one bone screw hole in the head portion has a diameter of 7.3 mm.
25. The bone plating system of claim 24 , wherein at least one of the bone screw holes in the head portion has a diameter of 5.0 mm.
26. The bone plating system of claim 14 , wherein the lower surface of the head portion that curves upward from the shaft portion is convex.
27. The bone plating system of claim 14 wherein the shaft portion contains a plurality of bone screw holes that have a threaded, conical taper extending continuously from the upper surface to the lower surface.
28. A bone plating system configured to be implanted for improving the stability of a bone fracture in a long bone, the bone plating system comprising:
(a) a bone plate including:
a lower surface, which when in an operative configuration, faces a bone to which the bone plate is to be attached;
an upper surface opposite the lower surface;
a shaft portion having a width, the shaft portion configured and dimensioned to extend along at least a length of a diaphysis of a bone to which the bone plate is configured to be attached, the shaft portion including a plurality of bone screw holes that are unthreaded; and
a head portion that is configured and dimensioned to extend along at least a length of a metaphysis of the bone to which the bone plate is configured to be attached, wherein the head portion flares outward from the shaft portion so as to have a width that is greater than the width of the shaft portion and which curves upward from the shaft portion, and the head portion has at least three bone screw holes, all of the bone screw holes of the head portion have a threaded, conical taper extending continuously from the upper surface to the lower surface;
(b) a plurality of locking bone screws having a threaded shaft for engaging bone and a threaded, conically-tapered head configured to mate with the threaded, conically tapered bone screw holes of the head portion; and
(c) a plurality of non-locking bone screws having a threaded shaft for engaging bone and an unthreaded, conically-tapered head.
29. The bone plating system of claim 28 , wherein at least two of the bone screw holes in the head portion have diameters different from each other.
30. The bone plating system of claim 28 , wherein the bone plate further comprises at least one hole for provisional fixation of the bone plate to the long bone.
31. The bone plating system of claim 30 , wherein the at least one provisional fixation hole is a suture hole.
32. The bone plating system of claim 31 , wherein the suture hole is located in the head portion.
33. The bone plating system of claim 28 , wherein the bone plate is configured and dimensioned for use with the tibia.
34. The bone plating system of claim 28 , wherein the bone plate is configured and dimensioned for use with the femur.
35. The bone plating system of claim 28 , wherein the lower surface of the head portion that curves upward from the shaft portion is convex.