A method for ameliorating joint conditions and diseases and preventing bone hypertrophy can include facilitating cartilage regrowth and preventing bone overgrowth to a damaged bone at a treatment site within a body joint to promote healing. The method can include providing a device having a first section comprising a joint-ward end having an inner surface and an outer surface and fenestrations between the inner and outer surfaces. A second section can include an opposing leading end and a lateral wall extending between the joint-ward end and the leading end. The leading end can be penetrated into the bone to a depth to substantially position:1) the joint-ward end in a cartilage zone or at a boundary/transition area; and 2) the second section in the bone. Bone overgrowth into the cartilage zone may be prevented within the body joint when the device is positioned at the treatment site.

A method for designing a two-part joint prosthesis (830) comprises: providing kinematic data of a subject's joint under load; and designing the joint prosthesis using the kinematic data, wherein the working surfaces of the two-part prosthesis comprise, consist essentially of or consist of cellular material. Advantageously, the method may not require any intra-operative adjustments to replace one or more of the components (831, 832), e.g. with a component of a different size. In particular, if components are made of biological tissues, such as a patient's own cells, it is advantageous to design and produce an implant that requires no adjustments intra-operatively as each implant may be manufactured specifically for each patient, and the time and costs of producing a range of sizes, most of which would not be required, would otherwise be prohibitive.

A unicompartmental orthopedic knee implant may include a tibial tray having a body including a joint-facing side, a bone-facing side opposite the joint-facing side, and a channel provided in the bone-facing side. The bone-facing side includes a bottom surface and a bone-contacting layer applied to the bottom surface. The bone-contacting layer configured to contact a tibia. The channel extends through the bone-contacting layer. The tibial tray may also include a protrusion for insertion into a corresponding opening in the tibia, the protrusion extending from the bottom surface at a non-zero angle. The implant may also include a fixation element coupled to the bone-facing side of the body. The fixation element may include a rail for insertion into the channel of the body, a support extending from the rail, and a bone engagement feature connected to the support, the bone engagement feature including an edge operable to penetrate the tibia.

Certain embodiments generally provide an improved tibial base member comprising keel portions that allow one or both cruciate ligaments to be preserved. Other embodiments provide improved lateral and/or medial inserts having a mesial lip that helps relieve and or prevent impingement between the femoral component and the tibial eminence. Other embodiments provide improved femoral components having various chamfers to provide additional clearance with respect to the tibial eminence and posterior cruciate ligament without decreasing bone coverage.

Exemplary arthroplasty systems and methods involve the implantation of a first implant having a convex bearing surface portion and a subchondral surface portion, and a second implant having a concave bearing surface portion and a subchondral surface portion, where the implants are configured for implantation into a joint of a patient to treat an osteochondral defect therein. The joint may be a knee joint, a shoulder joint, a hip joint, an ankle joint, a first metatarsal-phalangeal joint, or the like. In exemplary embodiments, the joint is a knee joint, the first implant is a femoral implant, and the second implant is a tibial implant.

There are provided herein methods and products resulting therefrom. The methods include attaching a pre-fabricated porous ingrowth structure to a substrate by applying heat, or creating and bonding an in-situ-formed porous ingrowth structure from beads on a substrate by applying heat. In some embodiments, an oxidized metal surface of the substrate is diffusion hardened during the heating process. In some embodiments, a vacuum is applied during the heating process. In some embodiments, pressure is applied during the heating process. Also provided herein are assemblies for compressing the pre-fabricated porous ingrowth structure or the beads onto the substrate during the heating process.

Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient's joint. The data can be used to create a model for analyzing a patient's joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.

A method of evaluating a human knee joint which includes a femur bone, a tibia bone, a patella bone, a patellar tendon, and ligaments, wherein the ligaments and patellar tendon are under anatomical tension to connect the femur and tibia together, creating a load-bearing articulating joint, the method including: inserting into the knee joint a gap balancer that includes a tibial interface surface, an opposed femoral interface surface, and at least one force sensor, the method including: providing an electronic receiving device; moving the knee joint through at least a portion of its range of motion; while moving the knee joint, using the electronic receiving device to collect data from the at least one force sensor; processing the collected data to produce a digital geometric model of at least a portion of the knee joint; and storing the digital geometric model for further use.

A method for ameliorating joint conditions and diseases and preventing bone hypertrophy can include facilitating cartilage regrowth and preventing bone overgrowth to a damaged bone at a treatment site within a body joint to promote healing. The method can include providing a device having a first section comprising a joint-ward end having an inner surface and an outer surface and fenestrations between the inner and outer surfaces. A second section can include an opposing leading end and a lateral wall extending between the joint-ward end and the leading end. The leading end can be penetrated into the bone to a depth to substantially position: 1) the joint-ward end in a cartilage zone or at a boundary/transition area; and 2) the second section in the bone. Bone overgrowth into the cartilage zone may be prevented within the body joint when the device is positioned at the treatment site.

The present disclosure relates to a unicondylar femoral prosthesis, a tibial pad and a unicondylar replacement prosthesis. The unicondylar femoral prosthesis includes an osteotomy surface configured to connect with a femur and an articular surface configured to abut a tibia. The articular surface includes a distal articular surface and a posterior condyle articular surface. The distal articular surface has a first curvature radius on a sagittal plane, the posterior condyle articular surface has a second curvature radius on the sagittal plane, and a ratio of the first curvature radius to the second curvature radius ranges from 1.4 to 2.1. The articular surface has a third curvature radius on a coronal plane, and the third curvature radius is equal to the first curvature radius.