Full wrist fusion device
Disclosed is a device for total wrist fusion that includes (a) a first section, which is preferably a plate, that is positioned under the skin on top of the forearm, wrist and potentially part of the hand and connected to one or more of the radius or carpal bones, (b) a second section, which is preferably in the shape of an awl and is received in the cannula of the third metacarpal bone. Optionally, an anti-rotational third section may be included, which can connect to the top of the third metacarpal bone.
1. A method of wrist fusion surgery using a unitary implant,
the unitary implant comprising:
an intramedullary metacarpal portion,
a radial plate portion, the radial plate portion comprising an aperture, wherein the radial plate portion includes a bended portion that has a drop distance from the radial plate portion to a point where the radial plate portion and the intramedullary metacarpal portion meet, and
an anti-rotational plate extending upward and outward from the bended portion, the anti-rotational plate comprising at least one aperture,
the method comprising the steps of:
exposing a radius, carpals and a metacarpal bone of the wrist of a patient;
placing the intramedullary metacarpal portion of the unitary implant into the metacarpal bone;
placing the radial plate portion onto the radius;
fixing the radial plate portion to the radius by attaching a fixation device through the aperture in the radial plate portion into the radius; and
fixing the anti-rotational plate to the metacarpal by attaching an additional fixation device through the at least one aperture in the anti-rotational plate into the metacarpal.
2. The method of wrist fusion surgery as set forth in claim 1 further comprising the step of flexing the wrist in a position to expose a proximal end of the metacarpal bone.
3. The method of wrist fusion surgery as set forth in claim 1 , wherein the radial plate portion is fixed to a dorsal aspect of the radius.
4. The method of wrist fusion surgery as set forth in claim 3 further comprising the step of straightening the wrist prior to placing the radial plate portion onto the dorsal aspect of the radius.
5. The method of wrist fusion surgery as set forth in claim 1 , wherein the radial plate portion includes at least one compression slot and the fixation device is a screw that extends through the at least one compression slot into the radius and the method further includes the step of applying compression to the wrist by screwing the screw through the at least one compression slot.
6. The method of wrist fusion surgery as set forth in claim 1 , wherein the unitary implant further includes an additional anti-rotational feature.
7. The method of wrist fusion surgery as set forth in claim 6 , wherein the additional anti-rotational feature is a rib on the intramedullary metacarpal portion.
8. The method of wrist fusion surgery as set forth in claim 6 , wherein the anti-rotational plate is removable from the unitary implant.
9. The method of wrist fusion surgery as set forth in claim 1 , wherein the metacarpal is a third metacarpal.
10. The method of wrist fusion surgery as set forth in claim 1 , wherein the bended portion includes at least one aperture and the bended portion is fixed to the wrist by screwing a screw through the at least one aperture into a carpal bone of the wrist.
11. The method of wrist fusion surgery as set forth in claim 1 , wherein the intramedullary metacarpal portion includes an aperture to receive a fixator and further comprising the step of using a drill guide associated with the implant to drive the fixator through the aperture in the intramedullary metacarpal portion.
12. The method of wrist fusion surgery as set forth in claim 1 , wherein the intramedullary metacarpal portion extends from the radial plate portion at an angle relative to the point at which the intramedullary metacarpal portion meets the radial plate portion.
13. The method of wrist fusion surgery as set forth in claim 12 , wherein the angle is between 10 degrees and 20 degrees.
14. The method of claim 1 , wherein the bended portion is at an angle between 10 degrees and 20 degrees.