Patent ID: 7909882
Filing Date: 2011-03-22
Classification: A61B,A61F

Abstract:
1. A prosthesis for repairing a joint between a bone having a ball portion of the joint and a socket structure in a patient, comprising: a shell having an arcuate inner surface and a hole passing through the shell and the hole has a countersunk portion extending from the inner surface; a ball unit having an arcuate outer surface capable of articulated motion in the arcuate inner surface of the shell and a cavity extending into the ball unit from the arcuate outer surface of the ball unit; a first fixing device and a second fixing device, each having a ratchet mechanism; an attachment mechanism comprised of the first fixing device, a first coupling member, a ligament, and a second coupling member, wherein the ligament couples the first coupling member to the second coupling member, and the first coupling member has a first end and a second end opposite of the first end, the first end having external ridges capable of engaging the ratchet mechanism of the first fixing device, the second end having a flange shaped to engage with the countersunk portion of the shell and the second coupling member is capable of coupling with the cavity of the ball unit; an extension member capable of coupling to the second coupling member; and a coupling device comprising a cannulated member and the second fixing device, the cannulated member having a first end and a second end, opposite of the first end, and ridges extending from an exterior surface of the cannulated member, the second fixing device having a contact surface, such that, when the prosthesis is surgically implanted in the patient, the ball unit is capable of being attached to the bone having the ball portion, after removing a portion of the ball portion, and the contact surface of the second fixing member is capable of operably contacting a surface of the bone opposite of the ball unit, tensioning the cannulated member between the first end of the cannulated member attached to the extension member and the second end of the cannulated member capable of being attached by the ratchet mechanism of the second fixing device to the surface of the bone opposite of the ball unit.