Bone implants and cutting apparatuses and methods

A surgical method for implanting a metatarsal-phalangeal implant with curved ends into a metatarsal-phalangeal joint, the method comprising:

• providing a monolithic metatarsal-phalangeal implant comprising a first end and an opposite second end;
• surgically exposing the metatarsal-phalangeal joint of a patient;
• separating a metatarsal bone from a proximal phalanx bone;
• obtaining a cone reamer;
• reaming the metatarsal bone with the cone reamer to form a convex end on the metatarsal bone for engaging the first end of the implant, the first end of the implant comprising a surface complementary to the convex end of the metatarsal bone;
• obtaining a cup reamer;
• reaming the proximal phalanx bone with the cup reamer to form a concave end on the proximal phalanx bone for engaging the second end of the implant, the second end of the implant comprising a surface complementary to the concave end of the proximal phalanx;
• inserting the metatarsal-phalangeal implant between the metatarsal bone and the proximal phalanx bone, wherein the first end of the implant is configured to mate with the convex end of the metatarsal bone and the second end of the implant is configured to mate with the concave end of the proximal phalanx bone, and
• securing the implant to the metatarsal bone and the proximal phalanx bone by positioning an external fixation device over the implant and attaching the fixation device to the metatarsal bone and the proximal phalanx bone,
• wherein the cone reamer comprises:
• a shank;
• a cutting portion coupled to a distal end of the shank with a plurality of cutting edges having a concave cutting surface;
• and
• a backstop received on the shank and positioned over the cutting portion to protect surrounding soft tissue from the cutting edges, and
• wherein the cup reamer comprises:
• a shank;
• a cutting portion coupled to a distal end of the shank with a plurality of cutting edges having a convex cutting surface;
• and
• a backstop received on the shank and positioned over the cutting portion to protect surrounding soft tissue from the cutting edges.