# US 10,307,261 B2 · Revision stepped tibial implant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,261 B2 - Document ID: US10307261B2 - Status: Granted - Kind: B2 - Application number: 15/953,908 - Filed: 2018-04-16 - Published: 2018-10-25 - Granted: 2019-06-04 - Earliest claimed: 2015-01-30 - Assignees: MicroPort Orthopedics Inc. - Applicants: MicroPort Orthopedics Inc. - Inventors: Russell Nevins - Web page: https://patentgrep.com/patent/US10307261B2 ## CPC - A61F 2/389: {Tibial components (A61F2/3868 takes precedence)} - A61F 2/30734: {Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect} - A61F 2/3868: {with sliding tibial bearing} - A61F 2002/30233: {Stepped cylinders, i.e. having discrete diameter changes} - A61F 2002/30235: {tubular, e.g. sleeves} - A61F 2002/30324: {differing in thickness} - A61F 2002/30405: {made by screwing complementary threads machined on the parts themselves} - A61F 2002/30428: {made by inserting a protrusion into a slot} - A61F 2002/30448: {using adhesives} - A61F 2002/30474: {using an intermediate sleeve interposed between both prosthetic parts to be coupled} - A61F 2002/30537: {adjustable} - A61F 2002/30538: {for adjusting angular orientation} - A61F 2002/30604: {modular} - A61F 2002/3069: {Revision endoprostheses} - A61F 2002/30738: {Sleeves} - A61F 2002/3085: {with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface} - A61F 2002/30897: {Stepped protrusions, i.e. having discrete diameter changes} - A61F 2220/0033: made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit - A61F 2220/0058: soldered or brazed or welded - A61F 2250/0006: for adjusting angular orientation - A61F 2250/0064: Sets comprising a plurality of prosthetic parts of different sizes - 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) ## Abstract A tibial implant having a stem and a tibial sleeve. The tibial sleeve having a proximal end and a distal end, where the proximal end includes an annular male portion. The tibial implant also includes an offset ring having a central bore that is offset from the center of the offset ring, where the bore of the offset ring receives the annular male portion of the tibial sleeve. The tibial implant further includes a base plate having a proximal end and a distal end, where the distal end of the base plate forms a female portion, and the female portion receives both the offset ring and the male portion of the tibial sleeve. ## Claims ### Claim 1 A tibial knee implant comprising: a tibial sleeve having a proximal end and a distal end, wherein the proximal end includes an annular male portion; a ring having a central bore therethrough, wherein the bore of the ring receives the annular male portion of the tibial sleeve; and a base plate having a proximal end and a distal end, wherein the distal end of the base plate forms a female portion, and wherein the female portion receives both the ring and the annular male portion of the tibial sleeve. ### Claim 2 (depends on 1) The tibial knee implant of claim 1, wherein the tibial sleeve includes a stepped exterior surface. ### Claim 3 (depends on 1) The tibial knee implant of claim 1, wherein the ring is removably engaged with the tibial sleeve. ### Claim 4 (depends on 1) The tibial knee implant of claim 1, wherein the base plate is removably engaged with the ring and tibial sleeve. ### Claim 5 (depends on 1) The tibial knee implant of claim 1, wherein the tibial sleeve includes an outer rim that extends from the proximal end of the tibial sleeve and surrounds the annular male portion. ### Claim 6 (depends on 5) The tibial knee implant of claim 5, wherein the outer rim does not extend further in the proximal direction than the annular male portion. ### Claim 7 (depends on 1) The tibial knee implant of claim 1, further comprising: a platform having a base portion and a post extending in a distal direction from the base portion, wherein the post extends through a bore in the base plate and a central bore in the tibial sleeve. ### Claim 8 (depends on 1) The tibial knee implant of claim 1, wherein the ring includes a first side and a second side, the second side opposite the first side, wherein the first side is 1 to 4 mm thicker in a radial direction than the second side. ### Claim 9 A tibial knee implant comprising: a tibial sleeve having a proximal end and a distal end, wherein the proximal end includes an annular male portion; a base plate having a proximal end and a distal end, wherein the distal end of the base plate forms a female portion, and wherein the female portion receives the male portion of the tibial sleeve; and a platform having a base portion and a post extending in a distal direction from the base portion, wherein the post extends through a bore in the base plate and a central bore in the tibial sleeve. ### Claim 10 (depends on 9) The tibial knee implant of claim 9, further comprising: a ring having a central bore therethrough, wherein the bore of the ring receives the annular male portion of the tibial sleeve. ### Claim 11 (depends on 10) The tibial knee implant of claim 10, wherein the female portion of the base plate receives the ring. ### Claim 12 (depends on 10) The tibial knee implant of claim 10, wherein the ring is removably engaged with the tibial sleeve. ### Claim 13 (depends on 10) The tibial knee implant of claim 10, wherein the tibial sleeve also includes an outer rim that extends from the proximal end of the tibial sleeve and surrounds the annular male portion. ### Claim 14 (depends on 13) The tibial knee implant of claim 13, wherein the outer rim does not extend further in the proximal direction than the annular male portion. ### Claim 15 (depends on 9) The tibial knee implant of claim 9, wherein the platform is removably engaged to the base plate and tibial sleeve. ### Claim 16 (depends on 10) The tibial knee implant of claim 10, wherein the ring includes a first side of the bore and a second side of the bore, opposite the first side, wherein the first side is 1 to 4 mm thicker in a radial direction than the second side. ### Claim 17 (depends on 9) The tibial knee implant of claim 9, wherein the tibial sleeve includes a stepped exterior surface. ### Claim 18 (depends on 9) The tibial knee implant of claim 9, wherein the base plate is removably engaged with the tibial sleeve.