Abstract: Deformable joint implants with a generally hyperbolic paraboloid shape are disclosed, including configurations for delivery into the small joints of the body in the wrists, hands, ankle and feet, such as the first carpo-metacarpal joint, which comprises a double-saddle structure. The center of the implant may be supported, or supported and configured as a central opening. Implants with supported center regions may have a uniform or non-uniform thickness. A region of non-uniform, reduced thickness may be circular, oval or ring-like in shape, with a central support that may have an increased thickness relative to the perimeter region of the implant.

Abstract: A percutaneously implantable orthopedic device is a shape-changing joint prosthesis with a generally arcuate or generally rectilinear configuration which is delivered through a delivery device in a substantially straightened or slightly curved configuration into a joint in a patient. The generally arcuate configuration may include an open ring or spiral shape. The generally rectilinear configuration may include a polygon or zig-zag shape. The delivery and retrieval device can be a syringe, hypodermic needle or cannula. The orthopedic device is moveable into its generally arcuate or generally rectilinear configuration in the joint by manipulation or a shape memory set. The orthopedic device acts as a soft compliant bearing surface or cushion that minimizes the bone-on-bone wear from articulation and loading.

Abstract: Delivery and retrieval systems for delivering or retrieving a shape-changing percutaneously implantable orthopedic device joint prosthesis that can move between a generally arcuate configuration and a substantially straightened or slightly curved configuration. The orthopedic device can be delivered with a needle that is joint expanding, actuating, pivotable, or can include a balloon. The orthopedic device acts as a soft compliant bearing surface or cushion that minimizes the bone-on-bone wear from articulation and loading and may include a covering or coating with tissue or an expanding hydrophilic material. The orthopedic device delivery system can include a loading device with a channel for storing the orthopedic device in a non-straightened configuration and orienting the orthopedic device in the proper implantation orientation. The orthopedic device can be advanced or retrieved through the loading device with a knob and/or a flexible plunger.

Abstract: A percutaneously implantable orthopedic device is a shape-changing joint prosthesis with a generally arcuate or generally rectilinear configuration which is delivered through a delivery device in a substantially straightened or slightly curved configuration into a joint in a patient. The generally arcuate configuration may include an open ring or spiral shape. The generally rectilinear configuration may include a polygon or zig-zag shape. The delivery and retrieval device can be a syringe, hypodermic needle or cannula. The orthopedic device is moveable into its generally arcuate or generally rectilinear configuration in the joint by manipulation or a shape memory set. The orthopedic device acts as a soft compliant bearing surface or cushion that minimizes the bone-on-bone wear from articulation and loading.

Abstract: Delivery and retrieval systems for delivering or retrieving a shape-changing percutaneously implantable orthopedic device joint prosthesis that can move between a generally arcuate configuration and a substantially straightened or slightly curved configuration. The orthopedic device can be delivered with a needle that is joint expanding, actuating, pivotable, or can include a balloon. The orthopedic device acts as a soft compliant bearing surface or cushion that minimizes the bone-on-bone wear from articulation and loading and may include a covering or coating with tissue or an expanding hydrophilic material. The orthopedic device delivery system can include a loading device with a channel for storing the orthopedic device in a non-straightened configuration and orienting the orthopedic device in the proper implantation orientation. The orthopedic device can be advanced or retrieved through the loading device with a knob and/or a flexible plunger.