Patent ID: 8062336

Claim:
An apparatus comprising: an implant; a fixation member comprising a first interface and a distal end implantable in a bone; and a rotational fastener comprising a second interface, wherein the second interface is rectilinearly translatable along the first interface, wherein the first and second interfaces have complementary antirotation features, wherein the apparatus comprises a locked configuration in which the rotational fastener engages the implant in any of a plurality of relative orientations between the implant and the rotational fastener about a first axis to substantially prevent any relative rotation between the implant and the rotational fastener about the first axis; wherein, in the locked configuration, the rotational fastener is slidably attachable to the fixation member to permit motion of the rotational fastener along the fixation member in a direction nonparallel to the first axis, wherein the rotational fastener comprises an interpositional member and an engagement member configured to be actuated with respect to the interpositional member to move the rotational fastener from an unlocked configuration to the locked configuration, wherein the engagement member is shaped to expand to move the rotational fastener from the unlocked configuration to the locked configuration, and wherein the rotational fastener further comprises a rotational locking member configured to be advanced along the interpositional member to urge the engagement member to expand, and to keep the rotational fastener in the locked configuration.