Resilient knee implant and methods

摘要

This disclosure is directed to a resilient interpositional arthroplasty implant for application into a knee joint to pad cartilage defects, cushion a joint, and replace or restore the articular surface, which may preserve joint integrity, reduce pain and improve function. The implant may endure variable joint compressive and shear forces and cyclic loads. The implant may repair, reconstruct, and regenerate joint anatomy, and thereby improve upon joint replacement alternatives. Rather than using periosteal harvesting for cell containment in joint resurfacing, the walls of this invention may capture, distribute and hold living cells until aggregation and hyaline cartilage regrowth occurs. The implant may be deployed into debrided joint spaces, molding and conforming to surrounding structures with sufficient stability to avoid extrusion or dislocation. Appendages of the implant may repair or reconstruct tendons or ligaments, and an interior of the implant that is inflatable may accommodate motions which mimic or approximate normal joint motion.

主权项

1. An implant configured for deployment between a femur and a tibia of a knee joint, the implant comprising:
a balloon comprising:
a first portion that is configured to engage a medial condyle and a lateral condyle of the femur of the knee joint,a second portion that is configured to engage the tibia of the knee joint,a side portion connecting the first portion and the second portion, in which the side portion facilitates relative motion between the first portion and the second portion, andan interior comprising of a plurality of inflatable non-communicating chambers configured to be selectively inflated and selectively deflated; and a first appendage configured to couple the balloon to the femur of the knee joint.