Periarticular bone plate with biplanar offset head member
View Patent ↗A periarticular bone plate for the internal fixation of a fractured, proximal tibia of a surgical patient includes a shaft member connected to a head member, a top surface, a bottom surface, a posterior edge, an anterior edge and a plurality of holes extending between the top and bottom surfaces for receiving fasteners for attaching the plate to the bone. The head member is offset relative to the shaft member in each of a frontal and sagittal planes of the proximal tibia.
1. A periarticular bone plate for use with bone fasteners for stabilizing a fracture of the proximal tibia, comprising:
a shaft portion and a head portion unitary with the shaft portion, the shaft and head portions having a bone contacting bottom surface, an opposite top surface, an anterior side, and a posterior side,
said head portion defining a first plurality of screw holes configured in a proximal row of at least three screw holes and a distal row of at least three screw holes, and said shaft portion defining a second plurality of screw holes longitudinally displaced relative to a longitudinal axis of said shaft, said first and second plurality of screw holes screw holes extending between said top and bottom surfaces for receiving fasteners for attaching said plate to the proximal tibia,
said head portion oriented transverse to said shaft portion and extending on only said posterior side of said shaft portion,
said shaft portion having a laterally straight proximal portion and a laterally straight distal portion that are angled relative to each other at an angle of 168° to 173°, a center of said angle located along said longitudinal axis of said shaft portion and positioned 42 mm to 50 mm from said proximal row in said head portion, and a center of an anteriormost screw hole of said first plurality of screw holes in said head portion being displaced in a posterior direction from said anterior side of said distal portion of said shaft portion by 10 mm to 12 mm such that said center of said anteriormost screw hole is located on a posterior side of said longitudinal axis of said shaft portion, and
said head portion having a frontal offset relative to said distal shaft portion by 14 mm to 20 mm.
2. A periarticular bone plate according to claim 1 , wherein:
said first plurality of screw holes are internally threaded such that the threads of said first plurality of screw holes define respective screw hole axes for said first plurality of screw holes along which said first plurality of screw holes are adapted to secure the fasteners to said plate.
3. A periarticular bone plate according to claim 2 , wherein:
said screw holes of said first plurality each include a recess thereabout.
4. A periarticular bone plate according to claim 1 , wherein:
said proximal and distal rows are parallel.
5. A periarticular bone plate according to claim 1 , wherein:
said second plurality of screw holes are internally threaded such that the threads of said second plurality screw holes define respective screw hole axes for said second plurality of screw holes along which said second plurality of screw holes are adapted to secure the fasteners to said plate.
6. A periarticular bone plate according to claim 1 , wherein:
said head portion includes a scalloped contour along a proximal edge and along said posterior side.
7. A periarticular bone plate according to claim 6 , wherein:
said head portion has a straight anterior side.
8. A periarticular bone plate according to claim 1 , further comprising:
the fastener.
9. A periarticular bone plate according to claim 8 , wherein:
said fastener is a locking fastener having a head with threads and a shaft.
10. A periarticular bone plate according to claim 8 , wherein:
said fastener is a non-locking compressive fastener having a non-threaded head and a shaft with bone-engaging threads.
11. A periarticular bone plate for use with bone fasteners for stabilizing a fracture of the proximal tibia, comprising:
a shaft portion and a head portion unitary with the shaft portion, the shaft and head portions having a bone contacting bottom surface, an opposite top surface, an anterior side, and a posterior side,
said head portion defining a first plurality of screw holes configured in a proximal row of at least three screw holes and a distal row of at least three screw holes, and said shaft portion defining a second plurality of screw holes longitudinally displaced relative to a longitudinal axis of said shaft, said first and second plurality of screw holes screw holes extending between said top and bottom surfaces for receiving fasteners for attaching said plate to the proximal tibia,
said head portion oriented transverse to said shaft portion and extending on only said posterior side of said shaft portion, and said head portion including a hole defined by a first path sized to guide a K-wire generally along a first axis extending through said top and bottom surfaces, and a second path having a second axis extending inward from a proximal edge to intersect said first axis at a point of intersection, wherein from said first path to said proximal edge said second path is located under said top surface,
said shaft portion having a laterally straight proximal portion and a laterally straight distal portion that are angled relative to each other at an angle of 168° to 173°, a center of said angle located along said longitudinal axis of shaft portion and positioned 42 mm to 50 mm from said proximal row in said head portion, and a center of an anteriormost screw hole of said first plurality of screw holes in said head portion being displaced from said anterior side of said distal portion of said shaft portion by 10 mm to 12 mm, and
said head portion having a frontal offset relative to said distal shaft portion by 14 mm to 20 mm.
12. A periarticular bone plate according to claim 11 , wherein:
from said first path to said proximal edge, said second path extends entirely between said top and bottom surfaces.
13. A periarticular bone plate for use with bone fasteners for stabilizing a fracture of the proximal tibia, comprising:
a shaft portion and a head portion unitary with the shaft portion, the shaft and head portions having a bone contacting bottom surface, an opposite top surface, an anterior side, and a posterior side,
said head portion defining a first plurality of screw holes, and said shaft portion defining a second plurality of screw holes longitudinally displaced relative to a longitudinal axis of said shaft, said first and second plurality of screw holes extending between said top and bottom surfaces for receiving fasteners for attaching said plate to the proximal tibia,
said head portion oriented transverse to said shaft portion and extending on only said posterior side of said shaft portion, and said head portion includes a hole defined by a first path sized to guide a K-wire generally along a first axis extending through said top and bottom surfaces, and a second path having a second axis extending inward from a proximal edge to intersect said first axis at a point of intersection, wherein from said first path to said proximal edge said second path is located under said top surface,
said shaft portion having a laterally straight proximal portion and a laterally straight distal portion that are angled relative to each other at an angle of 168° to 173°, a center of said angle located along said longitudinal axis of shaft portion and positioned 42 mm to 50 mm from a proximalmost screw hole in said head portion, and
said head portion having a frontal offset relative to said distal shaft portion.
14. A periarticular bone plate according to claim 13 , wherein:
from said first path to said proximal edge, said second path extends entirely between said top and bottom surfaces.
15. A periarticular bone plate according to claim 13 , wherein:
said frontal offset is 14 mm to 20 mm.
16. A periarticular bone plate according to claim 13 , wherein:
said first plurality of screw holes are arranged in proximal and distal rows.
17. A periarticular bone plate according to claim 13 , wherein:
said first plurality of screw holes are internally threaded such that the threads of said first plurality of screw holes define respective screw hole axes for said first plurality of screw holes along which said first plurality of screw holes are adapted to secure the fasteners to said plate.
18. A periarticular bone plate according to claim 13 , wherein:
said second plurality of screw holes are internally threaded such that the threads of said second plurality screw holes define respective screw hole axes for said second plurality of screw holes along which said second plurality of screw holes are adapted to secure the fasteners to said plate.
19. A periarticular bone plate according to claim 13 , wherein:
said head portion includes a scalloped contour along a proximal edge and along said posterior side, and a straight anterior side.