Subtalar implant
AssigneeBioPro, Inc.
InventorsGary E. Katz, David V. Mrak, Steven E. Thueme
Life of this patent
Estimating the term…
Abstract
An implant for insertion into a joint between articulating bones is provided. The implant includes a generally cylindrical metal body having a plurality of threads disposed thereon. The implant also includes a smooth polymeric portion that is configured to be disposed between the articulating bones of the joint. The polymeric portion provides a bearing surface for the articulating bones, and thus inhibits friction and irritation of the joint tissue. A pin is axially disposed through the polymeric portion and through the body and provides an attachment feature to facilitate rotation of the implant and engagement of the threads within the joint.
Claims18
An implant for insertion into a joint between articulating bones, the implant comprising:
- a generally cylindrical metal body having a proximal end and a distal end, and defining a longitudinal axis, the body including at least one thread disposed on an external surface thereof, the at least one thread being configured to engage tissue in the joint, the body further including a first axial hole disposed therethrough;
- a generally smooth polymeric portion directly contacting the proximal end of the body and comprising a non-resorbable material, the polymeric portion including an external surface configured to directly contact articulating bones of the joint and to provide a bearing surface for the articulating bones, the polymeric portion further including a second axial hole disposed therethrough and generally aligned with the first axial hole, the polymeric portion having a maximum diameter that is no greater than a maximum diameter of the body, thereby facilitating insertion of the implant into the joint, the external surface of the polymeric portion and the external surface of the body defining an external surface of the implant;
- and
- an elongate member disposed through the first and second axial holes, thereby maintaining the polymeric portion and the body in close proximity to each other.
An implant for insertion into a joint between articulating bones, the implant comprising:
- a generally cylindrical metal body having a proximal end and a distal end, and defining a longitudinal axis, the body including at least one thread disposed on an external surface thereof, the at least one thread being configured to engage tissue in the joint, and to draw the implant into the joint when the body is rotated in one direction about the longitudinal axis, the body further including a first axial hole disposed therethrough and generally parallel to the longitudinal axis;
- a polymeric portion comprising a non-resorbable material directly contacting the proximal end of the body, the polymeric portion including an external surface configured to directly contact articulating bones of the joint and to provide a bearing surface for the articulating bones, the polymeric portion further including a second axial hole disposed therethrough and generally parallel to the longitudinal axis, the polymeric portion having a maximum diameter that is no greater than a maximum diameter of the body, thereby facilitating insertion of the implant into the joint, the external surface of the polymeric portion and the external surface of the body defining an external surface of the implant;
- and
- an elongate member disposed through the first and second axial holes, the elongate member having a proximal end and a distal end, the proximal end including a first recess having at least one generally flat side to facilitate rotation of the implant in one direction about the longitudinal axis for insertion into the joint.
An implant for insertion into a joint between articulating bones, the implant comprising:
- a generally cylindrical metal body having a proximal end and a distal end, and defining a longitudinal axis, the body including a first axial hole disposed therethrough, and at least one thread disposed on an external surface thereof, the at least one thread being configured to engage tissue in the joint;
- a generally smooth polymeric portion directly contacting the proximal end of the body, the polymeric portion including a second axial hole disposed therethrough generally aligned with the first axial hole, and an external surface configured to directly contact articulating bones of the joint, thereby providing a bearing surface for the articulating bones, the polymeric portion having a maximum diameter that is no greater than a maximum diameter of the body, thereby facilitating insertion of the implant into the joint, the external surface of the polymeric portion and the external surface of the body defining an external surface of the implant;
- and
- an elongate member disposed through the first and second axial holes, and including an aperture disposed therethrough, the aperture being generally parallel to the longitudinal axis and configured to receive a guide tool for facilitating insertion of the implant into the joint.
Dependencies are inferred from the claim text.