Apparatus and method for replacement of a metatarsophalangeal joint with interphalangeal fusion

摘要

An apparatus and method for partial replacement of a metatarsophalangeal joint defined by a proximal face of a phalanx and a distal face of a metatarsal. The apparatus and method include a joint surface element and an elongated fusing element. The elongated fusing element has an end configured for tool engagement. The joint surface element has a generally concave surface configured to serve as the proximal face of the phalanx and a socket configured to engage the end of the elongated fusing element. The elongated fusing element fuses an interphalangeal joint when the apparatus is surgically implanted to prevent the deterioration of the interphalangeal joint.

主权项

1. An apparatus for partial replacement of a metatarsophalangeal joint defined by a proximal face of a phalanx and a distal face of a metatarsal, the apparatus comprising:
an elongated fusing element configured to restrain movement within an interphalangeal joint and having an end configured for engagement with a socket in a joint surface element; and the joint surface element having a head portion and stem portion, the head portion of the joint surface element having a first end with a generally concave surface configured to serve as the proximal face of the phalanx and a second end opposing the first end, the stem portion of the joint surface element having a frustoconical configuration, a first end attached to the second end of the head portion, and a second end with the socket configured to engage the end of the elongated fusing element, wherein an outer circumference of the first end of the stem portion of the joint surface element is greater than an outer circumference of the second end of the stem portion of the joint surface element, wherein the elongated fusing element fuses an interphalangeal joint when the elongated fusing element and the joint surface element are surgically implanted in the metatarsophalangeal joint.