Foot bone plate providing fixation and compression
A foot bone plate provides both fixation of two bones or bone portions and compression across their juncture. The foot bone plate has a plurality of bone screw bores positioned to receive and hold a bone screw on both sides of the two bones/bone portions (i.e. fixation), and a lateral flange positioned to receive and hold a bone screw across the foot bones/foot bone portions juncture (i.e. compression). The foot bone plate has an elongate body having a plurality of bores along its length configured to receive and hold a bone screw generally perpendicular to the foot bone plate and into the two foot bone portions. A flange is positioned at a side of the plate and includes a bore to receive and hold a bone screw. The flange and flange bore positions and holds the bone screw such that it extends through the juncture of the two bones/bone portions.
1. An implant for fixing and compressing two adjacent bone portions across their juncture, the implant comprising:
an elongate body defining a longitudinal axis and having an upper surface, a lower surface opposite the upper surface; a first lateral side, a second lateral side opposite the first lateral side, a first end, and a second end opposite the first end;
a plurality of cylindrical bores in the elongate body, at least one of the cylindrical bores having a first axis that extends between the upper surface of the elongate body and the lower surface of the elongate body, the plurality of cylindrical bores situated along the elongate body from the first end to the second end thereof, each cylindrical bore configured to receive and hold a bone screw in one of the two adjacent bone portions; and
a flange having a first portion and a second portion, the first portion extending from the first lateral side of the elongate body, the first portion comprising a neck having a recessed surface between the upper surface of the elongate body and the second portion of the flange, the second portion of the flange extending generally perpendicular to the lower surface of the elongate body and having a first surface, a second surface opposite the first surface, and a cylindrical bore with a second axis that extends between the first and second surfaces of the second portion;
wherein the first axis is generally perpendicular to the first longitudinal axis;
wherein the second axis extends at an oblique angle relative to the longitudinal axis of the elongate body so that a bone screw received in the cylindrical bore of the flange extends into the two adjacent bone portions and across their juncture;
wherein the longitudinal axis, the first axis, and the second axis are offset to each other and do not intersect; and
wherein bone screws used in the plurality of cylindrical bores of the elongate body provide fixation of the elongate body to the two adjacent bone portions, wherein a bone screw used in the cylindrical bore of the flange provides compression of the two adjacent bone portions across their juncture.
2. The implant of claim 1 , further comprising:
a cutout in the elongate body that extends between the upper surface of the elongate body and the lower surface of the elongate body, and situated proximate to the flange.
3. The implant of claim 2 , wherein the plurality of cylindrical bores in the elongate body includes two cylindrical bores proximate the first end of the elongate body, two cylindrical bores proximate the second end of the elongate body, and two cylindrical bores between the first and second ends of the elongate body.
4. The implant of claim 3 , wherein the first lateral side of the elongate body has a first length, and the second lateral side of the elongate body has a second length that is greater than the first length of the first lateral side.
5. The implant of claim 4 , further comprising:
a first rim extending continuously about and beveled between the upper surface of the elongate body adjacent the first lateral side of the elongate body, the first end of the elongate body, the second lateral side of the elongate body, and the second end of the elongate body; and
a second rim extending continuously about and beveled between the lower surface of the elongate body adjacent the first lateral side of the elongate body, the first end of the elongate body, the second lateral side of the elongate body, and the second end of the elongate body.
6. The implant of claim 5 , further comprising a bevel situated in the upper surface of the elongate body about each one of the plurality of cylindrical bores in the elongate body.
7. The implant of claim 1 , wherein the elongate body further defines a longitudinal third axis between the first and second ends, and wherein the third axis is at an acute angle relative to the second axis.
8. A method of providing fixation and compression of first and second adjacent bone portions of the foot, the method comprising:
providing an implant per claim 1 ;
installing the implant of claim 1 onto the first and second bone portions of adjacent bone portions via bone screws through the cylindrical bone screw bores of the plate; and
installing a bone screw through the flange of the plate, and into the first and second bone portions of the adjacent bone portions and through their juncture.
9. An implant for fixing and compressing two adjacent foot bone portions across their juncture, the implant comprising:
an elongate plate defining an upper surface, a lower surface opposite the upper surface; a first lateral side, a second lateral side opposite the first lateral side, a first end between the first lateral side and the second lateral side, and a second end opposite the first end and between the first lateral side and the second lateral side, wherein the elongate plate further defines a longitudinal first axis between the first and second ends;
a first pair of cylindrical bores in the elongate plate, each cylindrical bore having a second axis that extends between the upper surface of the elongate plate and the lower surface of the elongate plate and situated proximate the first end of the elongated plate, the first pair of cylindrical bores each configured to receive and hold a bone screw in one of the two adjacent foot bone portions;
a second pair of cylindrical bores in the elongate plate, each cylindrical bore having a third axis that extends between the upper surface of the elongate plate and the lower surface of the elongate plate and situated proximate the second end of the elongated plate, the second pair of cylindrical bores each configured to receive and hold a bone screw in another of the two adjacent foot bone portions; and
a flange having a first portion and a second portion, the first portion extending from the first lateral side of the elongate plate, the first portion comprising a neck having a recessed surface between the upper surface of the elongate plate and the second portion of the flange, the second portion of the flange extending from the first portion and generally perpendicular to the lower surface of the elongate plate, the second portion having a cylindrical bore with a fourth axis;
wherein the second and third axes are generally perpendicular to the first axis, wherein the fourth axis extends at an oblique angle relative to, and at an acute angle relative to, the longitudinal first axis of the elongate plate, wherein the longitudinal first axis, the second axis, the third axis, and the fourth axis are offset to each other and do not intersect, and wherein the cylindrical bore of the flange is configured to receive and hold a bone screw into the two adjacent foot bone portions and across their juncture; and
wherein bone screws used in the first and second pairs of cylindrical bores of the elongate plate provide fixation of the elongate plate to the two adjacent foot bone portions, while a bone screw used in the cylindrical bore of the flange provides compression of the two adjacent foot bone portions across their juncture.
10. The implant of claim 9 , further comprising:
a cutout in the elongate plate that extends between the upper surface of the elongate plate and the lower surface of the elongate plate, and situated proximate to the flange.
11. The implant of claim 10 , further comprising a third pair of cylindrical bores in the elongate plate, each one of which has an axis that extends between the upper surface of the elongate plate and the lower surface of the elongate plate and situated between the first pair of cylindrical bores in the elongate plate and the second pair of cylindrical bores in the elongate plate, wherein bone screws used in the third pair of cylindrical bores of the elongate plate provide fixation of the elongate plate to one of the two adjacent foot bone portions.
12. The implant of claim 11 , wherein the first lateral side of the elongate plate has a first length, and the second lateral side of the elongate plate has a second length that is greater than the first length of the first lateral side.
13. The implant of claim 12 , further comprising:
a first rim extending continuously about and beveled between the upper surface of the elongate plate adjacent the first lateral side of the elongate plate, the first end of the elongate plate, the second lateral side of the elongate plate, and the second end of the elongate plate; and
a second rim extending continuously about and beveled between the lower surface of the elongate plate adjacent the first lateral side of the elongate plate, the first end of the elongate plate, the second lateral side of the elongate plate, and the second end of the elongate plate.
14. The implant of claim 13 , further comprising a bevel situated in the upper surface of the elongate plate about the first, second, and third pairs of cylindrical bores in the elongate plate.