Intramedullary implant with proximal plate and method for its use
An orthopedic implant is specifically configured for use in osteotomies, in which part of the implant extends into an intramedullary portion of a first bone segment and a plate portion is external to the cortical surface of an adjacent bone segment to fix the segments to allow them to fuse. The body of the implant has a first end and a second end where the end which is inserted into the bone has a chamfer and a through hole having a hole axis optionally at an oblique angle to the longitudinal axis of the implant, and which can receive a screw, peg or pin. The second end of the implant includes a plate portion with at least two offset screws.
1. A surgical procedure to associated metatarsal, comprising the steps of:
making at least one incision to expose a head of the metatarsal and to form a 0.5-1.5 cm down a neck of the metatarsal;
translating the head of the metatarsal laterally;
reaming a remaining proximal portion of the metatarsal to form a recess defining a base in the intramedullary channel;
placing a guide wire in the metatarsal so as to extend to the base of the recess and leaving the guide wire in position;
positioning a cannulated implant over the guide wire and into the recess in the intramedullary channel, the implant having a plate portion configured to cooperate with a cortical surface of a bone, and including one or more through holes for receiving fasteners and further including a body member having a first end and a longitudinally opposing second end joined by curved exterior surface, with a cannulation formed around a long axis and extending from the second end to the first end, the implant being configured to lodge within the intramedullary channel of the associated long bone so as to avoid rotation within the channel and rotation about the osteotomy site, the first end being tapered or sharpened for insertion into the associated long bone and defining a through hole adjacent to the tapered or sharpened first end and configured to receive a threaded fastener so as to locate the fastener in perpendicular relation to the guide wire, and the second end extending into the plate portion so as to form an integral two member implant;
inserting at least one screw into a through hole in the plate portion so as to engage the cortical surface of the metatarsal head; and
inserting one screw into the through hole adjacent to the tapered or sharpened first end.
2. The surgical procedure as set forth in claim 1 , wherein the implant is provided as two pieces and further including the step of selecting and assembling the plate portion and the body portion.