# US 10,307,257 B2 · Resilient knee implant and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,257 B2 - Document ID: US10307257B2 - Status: Granted - Kind: B2 - Application number: 15/807,901 - Filed: 2017-11-09 - Published: 2018-03-08 - Granted: 2019-06-04 - Earliest claimed: 2010-01-22 - Assignees: Iorthopedics, Inc. - Applicants: iOrthopedics, Inc. - Inventors: Robert Thomas Grotz - Web page: https://patentgrep.com/patent/US10307257B2 ## CPC - A61F 2/3859: {Femoral components} - A61B 17/0642: {for bones, e.g. for osteosynthesis or connecting tendon to bone} - A61B 17/562: {Implants for placement in joint gaps without restricting joint motion, e.g. to reduce arthritic pain} - A61L 27/18: obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds - A61L 27/3817: {Cartilage-forming cells, e.g. pre-chondrocytes} - A61L 27/54: Biologically active materials, e.g. therapeutic substances {(A61L27/227 takes precedence)} - C08L 75/04: Polyurethanes - A61B 2017/561: {Implants with special means for releasing a drug} - A61F 2/38: for elbows or knees - A61F 2/3872: {Meniscus for implantation between the natural bone surfaces} - A61F 2002/30563: {having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers} - A61F 2002/30578: {having apertures, e.g. for receiving fixation screws} - A61F 2002/30583: {filled with hardenable fluid, e.g. curable in-situ} - A61F 2002/30586: {having two or more inflatable pockets or chambers} - A61F 2002/30677: {Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body} - A61F 2002/30754: {Implants for interposition between two natural articular surfaces} - A61F 2002/30772: {Apertures or holes, e.g. of circular cross section} - A61F 2002/3863: {Condyles fitted on an anchored base} - A61L 2300/402: Anaestetics, analgesics, e.g. lidocaine - A61L 2300/404: Biocides, antimicrobial agents, antiseptic agents - A61L 2300/406: Antibiotics - A61L 2300/414: Growth factors - A61L 2300/416: Anti-neoplastic or anti-proliferative or anti-restenosis or anti-angiogenic agents, e.g. paclitaxel, sirolimus - A61L 2300/452: Lubricants - A61L 2300/64: Animal cells - A61L 2430/24: for joint reconstruction - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract This disclosure is directed to a resilient interpositional arthroplasty implant for application into a joint to pad cartilage defects, cushion, 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. 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 so as to enable immediate limb use after outpatient surgery. Appendages of the implant may repair or reconstruct tendons or ligaments, and menisci by interpositional compliant polymer arthroplasties that promote anatomic joint motion. ## Claims ### Claim 1 A knee implant comprising: a first appendage that is configured to engage a medial condyle of a femur of a knee joint, the first appendage comprising a bone engaging surface and an articulating surface, a second appendage that is configured to engage a lateral condyle of a femur of a knee joint, the second appendage comprising a bone engaging surface and an articulating surface, an average thickness, prefabricated holes for aiding in the attachment of the implant to a bone, a slot between the first appendage and the second appendage, and a rim defining the periphery of the implant, wherein the bone engaging surface of the first appendage has a similar radial curvature profile as the articulating surface of the first appendage. ### Claim 2 (depends on 1) The knee implant of claim 1, wherein the average thickness of the implant of is from 0.05 to 5 mm. ### Claim 3 (depends on 1) The knee implant of claim 1, wherein the rim is a filleted rim. ### Claim 4 (depends on 1) The knee implant of claim 1, wherein the filleted rim has a variable fillet. ### Claim 5 (depends on 1) The implant of claim 1, wherein the implant is manufactured from a thermoplastic polycarbonate urethane. ### Claim 6 (depends on 1) The implant of claim 1, wherein the implant is a single polymeric layer of thermoplastic polycarbonate urethane. ### Claim 7 (depends on 1) The implant of claim 1, wherein the rim has a dimension that is 1.0 to 3.5 times the thickness of the implant. ### Claim 8 A knee implant comprising a first appendage that is configured to engage a medial condyle of a femur of a knee joint, the first appendage comprising a bone engaging surface and an articulating surface, a second appendage that is configured to engage a lateral condyle of a femur of a knee joint, the second appendage comprising a bone engaging surface and an articulating surface wherein after implanting the implant, the articulating surfaces of both the first appendage and the second appendage articulate relative to a patella, prefabricated holes for aiding in the attachment of the implant to a bone, an average thickness through a main body of the implant of from 0.05 to 5 mm, a slot between the first appendage and the second appendage, the main body of the implant defined in its periphery by a rim, wherein the bone engaging surface of the first appendage has a similar radial curvature profile as the articulating surface of the first appendage. ### Claim 9 (depends on 8) The knee implant of claim 8, wherein the rim is a filleted rim. ### Claim 10 (depends on 8) The implant of claim 8, wherein the implant is manufactured from a thermoplastic polycarbonate urethane. ### Claim 11 (depends on 8) The implant of claim 8, wherein the implant is a single polymeric layer of thermoplastic polycarbonate urethane. ### Claim 12 A knee implant comprising a first appendage that is configured to engage a medial condyle of a femur of a knee joint, the first appendage comprising a bone engaging surface and an articulating surface, a second appendage that is configured to engage a lateral condyle of a femur of a knee joint, the second appendage comprising a bone engaging surface and an articulating surface wherein once implanted the articulating surface articulates relative to at least one ligament, prefabricated holes for aiding in the attachment of the implant to a bone, an average thickness through a main body of the implant of from 0.05 to 5 mm, a slot between the first appendage and the second appendage, the main body of the implant defined in its periphery by a filleted rim, wherein the bone engaging surface of the first appendage has a similar radial curvature profile as the articulating surface of the first appendage. ### Claim 13 (depends on 12) The implant of claim 12, wherein the implant is manufactured from a thermoplastic polycarbonate urethane. ### Claim 14 (depends on 12) The implant of claim 12, wherein the implant is a single polymeric layer of thermoplastic polycarbonate urethane.