Devices descending from K021657
92 later devices reach Uknee Total Knee System through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K103733 | United U2 Xpe Total Knee System | United Orthopedic Corporation | 2011 | 8 | 2 |
| +1 | K102367 | Optigen Total Knee System | U&I Corp. | 2010 | 0 | — |
| +1 | K090988 | GMK Total Knee System | Medacta International S.A. | 2009 | 52 | 1 |
| +1 | K051640 | U2 Total Knee System | United Orthopedic Corp. | 2006 | 38 | 1 |
| +2 | K262057 | GMK Extension | Medacta International SA | 2026 | 0 | — |
| +2 | K234044 | ACS® LD FB Knee System | Implantcast GmbH | 2024 | 1 | — |
| +2 | K230850 | United Orthopedic Knee Patient Specific Instrumentation | Enhatch, Inc. | 2023 | 0 | — |
| +2 | K222700 | Tibial baseplate, Tibial insert | United Orthopedic Corporation | 2022 | 0 | — |
| +2 | K221850 | GMK 3D Metal Tibial Tray | Medacta International S.A. | 2022 | 1 | — |
| +2 | K202684 | GMK Total Knee System - TiNbN Coating | Medacta International S.A. | 2020 | 3 | — |
| +2 | K202022 | GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made of E-CROSS… | Medacta International S.A. | 2020 | 1 | — |
| +2 | K170753 | Acculoc Total Knee System | Rootloc Co., Ltd. | 2018 | 3 | — |
| +2 | K161705 | U2 Total Knee System E-XPE products | United Orthopedic Corporation | 2017 | 1 | — |
| +2 | K161360 | U2 Total Knee System, PSA Tibial Insert | United Orthopedic Corporation | 2017 | 0 | — |
| +2 | K152430 | All Poly Tibial Component | United Orthopedic Corporation | 2016 | 0 | — |
| +2 | K150829 | U2 Total Knee System- Additional Sizes | United Orthopedic Corporation | 2015 | 3 | — |
| +2 | K142649 | Progressive Orthopedic Total Knee System | The Progressive Orthopaedic Company, LLC | 2015 | 10 | — |
| +2 | K142069 | GMK Extension | Medacta International | 2014 | 4 | — |
| +2 | K140826 | GMK Sphere Extension | Medacta International | 2014 | 17 | — |
| +2 | K140073 | U2 Femoral Component, CR, Cemented | United Orthopedic Corp. | 2014 | 4 | — |
| +2 | K140075 | U2 Femoral Component, CR, Porous Coated | United Orthopedic Corp. | 2014 | 3 | — |
| +2 | K132752 | Ultracongruent Insert | United Orthopedic Corporation | 2014 | 5 | — |
| +2 | K131864 | U2 Tibial Baseplate- Cma Type, Tibial Insert and Augment | United Orthopedic Corporation | 2014 | 5 | — |
| +2 | K133630 | GMK Short Stem | Medacta International | 2013 | 1 | — |
| +2 | K131398 | Novoknee Total Knee System | Novosource, Inc. | 2013 | 10 | — |
| +2 | K131310 | GMK Full PE Tibial Components | Medacta International | 2013 | 2 | — |
| +2 | K123721 | GMK Revision Extension | Medacta International | 2013 | 3 | — |
| +2 | K123339 | TK1 Total Knee System | Novosource, Inc. | 2013 | 11 | — |
| +2 | K122232 | GMK Narrow | Medacta International | 2012 | 8 | — |
| +2 | K121416 | GMK Sphere | Medacta International | 2012 | 20 | — |
| +2 | K120790 | GMK - Line Extension | Medacta International | 2012 | 11 | — |
| +2 | K120507 | United U2 Femoral Component, PS, #7 | United Orthopedic Corporation | 2012 | 4 | 1 |
| +2 | K113571 | GMK Resufacing Patella Size 4 | Medacta International | 2012 | 23 | — |
| +2 | K111283 | GMK Revision Hybrid Liners | Medacta International | 2011 | 0 | — |
| +2 | K103170 | GMK Revision Knee SC Liners | Medacta International S.A. | 2011 | 28 | — |
| +2 | K102437 | GMK Revision Knee System | Medacta International S.A. | 2010 | 34 | — |
| +2 | K093806 | Myknee Cutting Blocks | Medacta International S.A. | 2010 | 16 | — |
| +2 | K082424 | United U2 Total Knee System | United Orthopedic Corp. | 2008 | 15 | 2 |
| +2 | K082469 | United U2 Patella | United Orthopedic Corp. | 2008 | 0 | — |
| +3 | K261032 | NovoKnee (SteriKnee) | NovoSource | 2026 | 0 | — |
| +3 | K260037 | implantcast Packaging System Update | Implantcast GmbH | 2026 | 0 | — |
| +3 | K253328 | GMK 3D Metal Tibial Tray Extension | Medacta International S.A. | 2026 | 0 | — |
| +3 | K252725 | Stem Extension Line (U2 Total Knee System—PSA Type) | United Orthopedic Corporation | 2025 | 0 | — |
| +3 | K242410 | NextStep Arthropedix Total Knee System | Nextstep Arthropedix | 2025 | 0 | — |
| +3 | K231975 | PNK Total Knee System | Tjc Life Co., Ltd. | 2023 | 0 | — |
| +3 | K231037 | MyKnee UNI-ST | Medacta International S.A. | 2023 | 0 | — |
| +3 | K221705 | U2 Total Knee System-PF+ | United Orthopedic Corporation | 2023 | 1 | — |
| +3 | K223548 | GMK Sphere & GMK SpheriKA Cementless | Medacta International S.A. | 2023 | 1 | — |
| +3 | K210695 | CPM Medical Consultants Tibial Revision Knee System | Cpm Medical Consultants, LLC | 2021 | 0 | — |
| +3 | K211664 | GMK Sphere Revision | Medacta International S.A. | 2021 | 0 | — |
| +3 | K211004 | GMK Spherika Femurs and Fixed Tibial Trays Plus | Medacta International S.A. | 2021 | 4 | — |
| +3 | K210961 | U2 Total Knee System, XPE Tibial Insert, PS PLUS | United Orthopedic Corporation | 2021 | 0 | — |
| +3 | K210062 | Mectaplug PE II | Medacta International S.A. | 2021 | 0 | — |
| +3 | K210010 | GMK Revision & Hinge Extension - TiNbN Coating | Medacta International S.A. | 2021 | 1 | — |
| +3 | K203755 | Shoulder System - TiNbN Coating | Medacta International S.A. | 2021 | 0 | — |
| +3 | K193559 | NextAR TKA Platform | Medacta Inernational SA | 2020 | 12 | — |
| +3 | K190100 | USTAR II System | United Orthopedic Corporation | 2019 | 2 | 5 |
| +3 | K190355 | Precision Casting Solutions Total Knee System | Precision Casting Solutions, Inc. | 2019 | 0 | — |
| +3 | K183344 | The Progressive Orthopaedic Company Total Knee System II | The Progressive Orthopaedic Company, LLC | 2019 | 0 | — |
| +3 | K183225 | Stabil Orthopaedic Solutions Total Knee System | Stabil Orthopaedic Solutions, LLC | 2019 | 0 | — |
| +3 | K182370 | Acculoc Total Knee System | Rootloc Co., Ltd. | 2018 | 0 | — |
| +3 | K173890 | GMK Sphere - Kinematic Alignment | Medacta International S.A. | 2018 | 6 | — |
| +3 | K181635 | GMK Sphere CR Tibial Inserts | Medacta International S.A. | 2018 | 2 | — |
| +3 | K181146 | ASK System | L and K Biomed Corporation Limited | 2018 | 0 | — |
| +3 | K172347 | GMK Hinge, GMK Revision | Medacta International S.A. | 2017 | 2 | — |
| +3 | K170106 | MyKnee PPS-Pin Positioners | Medacta International S.A. | 2017 | 2 | — |
| +3 | K162035 | GMK Sphere | Medacta International S.A. | 2017 | 10 | — |
| +3 | K163311 | GMK Revision Femoral Distal Augmentation | Medacta International S.A. | 2016 | 2 | — |
| +3 | K150832 | U2 Femoral Component, CR, Porous Coated, Additional Sizes | United Orthopedic Corporation | 2015 | 2 | — |
| +3 | K150783 | Progressive Orthopaedic Total Knee System | The Progressive Orthopaedic Company, LLC | 2015 | 8 | — |
| +3 | K131116 | U2 Total Knee System - Psa Type, Offset Stem Adapter | United Orthopedic Corporation | 2013 | 0 | — |
| +3 | K122183 | Augment and Screw, Psa Type | United Orthopedic Corp. | 2013 | 10 | — |
| +3 | K100981 | United Stem, Psa Type | United Orthopedic Corp. | 2010 | 3 | — |
| +4 | K252847 | NextAR Hip Platform | Medacta International S.A. | 2026 | 0 | — |
| +4 | K251737 | NextAR (TM) Shoulder Platform | Medacta International S.A. | 2025 | 0 | — |
| +4 | K252303 | Stem Extension Line (USTAR II System) | United Orthopedic Corporation | 2025 | 0 | — |
| +4 | K243656 | U2 Total Knee System – PF+ Patella; USTAR II System– PF+ Patella | United Orthopedic Corporation | 2025 | 0 | — |
| +4 | K243574 | Evolution® Total Knee Systems - Kinematic Alignment Instrumentation and Technique | Microport Orthopedics, Inc. | 2025 | 1 | — |
| +4 | K220705 | MyKnee R Pin Positioners | Medacta International S.A. | 2022 | 0 | — |
| +4 | K213751 | NextAR™ TKA Platform My Knee PPS | Medacta International S.A. | 2022 | 0 | — |
| +4 | K210859 | NextAR™ Spine Platform | Medacta International S.A. | 2021 | 4 | — |
| +4 | K210153 | NextAR RSA Platform | Medacta International S.A. | 2021 | 5 | 1 |
| +4 | K202152 | NextAR TKA Platform | Medacta International S.A. | 2020 | 11 | — |
| +4 | K201343 | Triathlon Total KneeSystem | Howmedica Osteonics Corp., Dba Stryker Orthopaedics | 2020 | 3 | — |
| +5 | K253728 | EVOLUTION® AM BIOFOAM® Tibial System | Microport Orthopedics, Inc. | 2026 | 0 | — |
| +5 | K261898 | Triathlon® Knee System; Triathlon® Hinge Knee System; Scorpio® Total Knee System | Howmedica Osteonics Corp. dba Stryker Orthopaedics | 2026 | 0 | — |
| +5 | K250477 | NextAR (TM) Spine | Medacta International S.A. | 2025 | 0 | — |
| +5 | K250108 | OptiVu™ Shoulder | Mr Surgical Solutions, LLC | 2025 | 1 | — |
| +5 | K232280 | NextAR™ TSA Platform | Medacta International S.A. | 2023 | 1 | — |
| +5 | K223769 | NextAR™ Spine Platform | Medacta International S.A. | 2023 | 2 | — |
| +6 | K252170 | OptiVu™ Shoulder | Mr Surgical Solutions, LLC | 2025 | 0 | — |
| +6 | K233172 | NextAR™ Spine Platform | Medacta International S.A. | 2024 | 1 | — |