Orthopedic plate with modular peg and compression screw
Assemblies and methods for fixation of bone or bone fragments using an orthopedic plate, a modular peg, and a compression screw. The modular peg is screwed into one of the apertures of the orthopedic plate. The modular peg may include an aperture having screw threads designed to receive the threads of the compression screw and serve as an anchor for the compression screw. By rotating the compression screw in relation to the modular peg, the compression screw may advance through the aperture of the modular peg, drawing the head of the screw toward the modular peg, and compressing the bone or bone fragments.
1. A system capable of fixating bones or bone fragments comprising:
an orthopedic plate having a longitudinal plate axis, and a first bore;
a peg extending along a longitudinal peg axis and comprising a first lower portion rotatably connected to a first upper portion, an outer surfaces of the first upper portion capable of mating with the first bore, the first lower portion comprising a first transverse bore along a first bore axis transverse to and at a first angle about the longitudinal peg axis, wherein an inner surface of the first transverse bore comprises threads;
a compression screw extending along a longitudinal screw axis, wherein the outer surface comprises screw threads that mate with the threads of the first transverse bore at the first angle and relative to the first longitudinal axis of the orthopedic plate, wherein the first lower portion is configured to be rotated about the longitudinal peg axis to the first angle after mating the first upper portion with the first bore.
2. The system of claim 1 , wherein the orthopedic plate further comprises a second bore.
3. The system of claim 2 , further comprising a first bone screw having a shaft and a head, wherein the first bone screw couples to the orthopedic plate by being inserted through the second bore, until the exterior surface of the head of the first bone screw abuts the interior surface of the second bore and the threaded portion of the first bone screw extends to engage bone or bone fragment.
4. The system of claim 3 , wherein the second bore has the shape of an elongated circle.
5. The system of claim 4 , wherein the orthopedic plate further comprises a third bore.
6. The system of claim 5 , further comprising a second bone screw having a shaft and a head, wherein the second bone screw couples to the orthopedic plate by being inserted through the third bore until the exterior surface of the head of the second bone screw abuts the interior surface of the third bore and the threaded portion of the second bone screw extends to engage bone or bone fragment.
7. The system of claim 5 , further comprising a second peg extending along a second longitudinal peg axis and comprising a second upper portion rotatably connected to a second lower portion, the outer surface of the second upper portion capable of mating with the third bore, the second lower portion comprising a second transverse bore along a second bore axis transverse to and at a second angle about the second longitudinal peg axis, wherein the inner surface of the second transverse bore comprises threads.
8. The system of claim 6 , wherein the third bore has the shape of an elongated circle.
9. The system of claim 8 , wherein the longitudinal plate axis is parallel to a longitudinal axis of the elongated second bore and elongated third bore are parallel.
10. The system of claim 1 , wherein rotating the compression screw brings the head of the compression screw closer to the peg, thereby compressing the bones or bone fragments.
11. The system of claim 1 , wherein the first angle about the longitudinal peg axis is perpendicular relative to the longitudinal plate axis.
12. The system of claim 1 , wherein the first angle about the longitudinal peg axis is parallel relative to the longitudinal plate axis.
13. They system of claim 1 , wherein the first angle about the longitudinal peg axis forms an acute angle relative to the longitudinal plate axis of the orthopedic plate.
14. The system of claim 1 , wherein the first bore axis is perpendicular to the longitudinal peg axis.
15. The system of claim 1 , wherein the first bore axis is not perpendicular to the longitudinal peg axis.
16. The system of claim 1 , wherein the first lower portion comprises a second transverse bore along a second bore axis transverse to and at a second angle about the longitudinal peg axis, wherein the inner surface of the second transverse bore comprises threads.
17. The system of claim 16 , further comprising a second a compression screw extending along a second longitudinal screw axis, wherein the outer surface comprises screw threads that mate with the threads of the second transverse bore at the second angle and relative to the first longitudinal axis of the orthopedic plate.
18. The system of claim 17 , wherein the second angle relative to the first longitudinal axis of the orthopedic plate is substantially the same as the first angle.
19. The system of claim 17 , wherein the second angle relative to the first longitudinal axis of the orthopedic plate is different than that of the first angle.