Orthopedic implant in the form of a plate to be fixed between two bone parts
View Patent ↗The invention relates to a plate fixed between two bone parts by way of screws engaged in holes formed in the thickness of said plate. The plate comprises an angled member or rib which is inclined according to an angle of between about 30° and 60° in relation to the plane defined by the plate. The angled member or rib has a hole for engaging a screw and is located in the central part of the width, over a determined part of the length of the plate, so that the screw brings the two bone parts into a compressive position.
1. An orthopedic implant comprising:
a plate having top and bottom surfaces and a length sufficient to span a fracture or joint of a patient, such that the plate is positioned alongside first and second bone parts or bones straddling the fracture or joint, the plate including an angled extension extending at an angle to the bottom surface of the plate below the bottom surface of the plate, the extension including a first hole arranged at an angle relative to the bottom surface of the plate, the angle of the first hole directing a first fixation member inserted through the first hole at an angle configured to cross the fracture or joint, wherein the angle of the first fixation member relative to the plate is adjustable, and wherein the first hole has a diameter that is less than a diameter of a head of the first fixation member; and
a guide slot formed through the plate above the first hole, the guide slot at least partially defining a fixation pathway extending from the top surface of the plate through the first hole of the extension, the guide slot being sized to allow passage of the first fixation member and its head into the first hole along the fixation pathway.
2. An orthopedic implant as claimed in claim 1 , further comprising a second and third hole spaced apart by a distance sufficient to span the joint or fracture, the second hole being positionable over a first bone part or bone of the fracture or joint and the third hole being positionable over a second bone part or bone of the fracture or joint.
3. An orthopedic implant as claimed in claim 1 , wherein the extension is a tab extending from the bottom surface of the plate.
4. An orthopedic implant as claimed in claim 1 , wherein the guide slot is bounded by non-threaded side walls extending through the top and bottom surfaces of the plate, the side walls being dimensioned to allow insertion of the first fixation member through the guide slot and into the first hole.
5. An orthopedic implant as claimed in claim 1 , wherein a central axis of the first hole extends at an angle of between about 30° and 60° with respect to the plate.
6. An orthopedic implant as claimed in claim 2 , wherein the second and third holes are locking holes adapted to fixedly secure fixation members to the plate.
7. An orthopedic implant as claimed in claim 1 , wherein portions the bottom surface of the plate entirely surround the extension, the portions being arranged to contact bone when the implant is implanted.
8. An orthopedic implant as claimed in claim 1 , wherein the angle of the extension relative to the plate is adjustable.
9. An orthopedic implant as claimed in claim 8 , wherein the extension is bendable to adjust the angle of the extension relative to the plate.
10. A system including an orthopedic implant as claimed in claim 1 , in which the system further comprises a template of the plate for use in determining the position of the extension against bone.
11. A method of using an orthopedic implant as claimed in claim 1 , comprising:
providing the orthopedic implant of claim 1 ;
positioning the plate against first and second bones spanning a joint of the patient; and
inserting a fixation member through the first hole so that the fixation member crosses the joint and compresses together the first and second bones to affect fusion.
12. A method of using an orthopedic implant as claimed in claim 1 , comprising:
providing the orthopedic implant of claim 1 ;
positioning the plate against first and second bone parts spanning a fracture of the patient; and
inserting a fixation member through the first hole so that the fixation member crosses the fracture and compresses together the first and second bone parts to affect fusion.
13. An orthopedic implant comprising:
a plate having top and bottom surfaces and first and second holes adapted to receive fixation members, the first and second holes being spaced apart by a distance sufficient to span a joint or fracture of a patient, such that the first hole is positioned over a first bone portion and the second hole is positioned over a second bone portion, the plate including an angled extension extending at an angle to the bottom surface of the plate below the bottom surface of the plate, the extension including a third hole arranged at an angle relative to the bottom surface of the plate, the angle of the third hole directing a first fixation member inserted through the third hole at an angle configured to cross the fracture or joint, wherein the angle of the first fixation member relative to the plate is adjustable, and wherein the third hole has a diameter that is less than a diameter of a head of the first fixation member; and
a guide slot formed through the plate above the third hole, the guide slot at least partially defining a fixation pathway extending from the top surface of the plate through the third hole of the extension, the guide slot being sized to allow passage of the first fixation member and its head into the third hole along the fixation pathway.
14. An orthopedic implant as claimed in claim 13 , wherein the extension is a tab extending from the bottom surface of the plate.
15. An orthopedic implant as claimed in claim 13 , wherein the guide slot is bounded by non-threaded side walls extending through the top and bottom surfaces of the plate, the side walls being dimensioned to allow insertion of the first fixation member through the guide slot and into the third hole.
16. An orthopedic implant as claimed in claim 15 , wherein a central axis of the third hole extends at an angle of between about 30° and 60° with respect to the plate.
17. An orthopedic implant as claimed in claim 13 , wherein the first and second holes are locking holes adapted to fixedly secure fixation members to the plate.
18. An orthopedic implant as claimed in claim 15 , wherein portions the bottom surface of the plate entirely surround the extension, the portions being arranged to contact bone when the implant is implanted.
19. An orthopedic implant as claimed in claim 13 , wherein the angle of the extension relative to the plate is adjustable.
20. An orthopedic implant as claimed in claim 19 , wherein the extension is bendable to adjust the angle of the extension relative to the plate.
21. An orthopedic implant as claimed in claim 13 , further comprising an elongate hole adapted to receive a guide wire, wherein a width of the elongate hole is substantially equal to a diameter of the guide wire, while a length of the elongate hole is greater than the diameter of the guide wire so that the guide wire can translate within the elongate hole.
22. An orthopedic implant comprising:
a plate having top and bottom surfaces and first and second holes adapted to receive fixation members, the first and a second holes being spaced apart by a distance sufficient to span a joint or fracture of a patient, such that the first hole is positioned over a first bone portion and the second hole is positioned over a second bone portion, the plate including an angled extension extending at an angle to the bottom surface of the plate below the bottom surface of the plate, the extension including a third hole arranged at an angle relative to the bottom surface of the plate, the angle of the third hole directing a first fixation member inserted through the third hole at an angle configured to cross the fracture or joint, wherein portions the bottom surface of the plate entirely surround the extension, the portions being arranged to contact bone when the implant is implanted, wherein the angle of the first fixation member relative to the plate is adjustable, and wherein the first hole has a diameter that is less than a diameter of a head of the first fixation member; and
a guide slot formed through the plate above the first hole, the guide slot at least partially defining a fixation pathway extending from the top surface of the plate through the first hole of the extension, the guide slot being sized to allow passage of the first fixation member and its head into the first hole along the fixation pathway.
23. An orthopedic implant as claimed in claim 22 , wherein the extension extends at an angle of between about 30° and 60° with respect to the plate.
24. An orthopedic implant as claimed in claim 22 , wherein the first and second holes are locking holes adapted to fixedly secure fixation members to the plate.
25. An orthopedic implant as claimed in claim 22 , wherein the angle of the extension relative to the plate is adjustable.
26. An orthopedic implant as claimed in claim 25 , wherein the extension is bendable to adjust the angle of the extension relative to the plate.
27. An orthopedic implant as claimed in claim 22 , wherein the extension is a tab extending from the bottom surface of the plate.
28. An orthopedic implant as claimed in claim 22 , wherein the guide slot is bounded by non-threaded side walls extending through the top and bottom surfaces of the plate, the side walls being dimensioned to allow insertion of the first fixation member through the guide slot and into the third hole.