Devices descending from K051640
38 later devices reach U2 Total Knee System through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K230850 | United Orthopedic Knee Patient Specific Instrumentation | Enhatch, Inc. | 2023 | 0 | — |
| +1 | K222700 | Tibial baseplate, Tibial insert | United Orthopedic Corporation | 2022 | 0 | — |
| +1 | K170753 | Acculoc Total Knee System | Rootloc Co., Ltd. | 2018 | 3 | — |
| +1 | K152430 | All Poly Tibial Component | United Orthopedic Corporation | 2016 | 0 | — |
| +1 | K150829 | U2 Total Knee System- Additional Sizes | United Orthopedic Corporation | 2015 | 3 | — |
| +1 | K142649 | Progressive Orthopedic Total Knee System | The Progressive Orthopaedic Company, LLC | 2015 | 10 | — |
| +1 | K140073 | U2 Femoral Component, CR, Cemented | United Orthopedic Corp. | 2014 | 4 | — |
| +1 | K140075 | U2 Femoral Component, CR, Porous Coated | United Orthopedic Corp. | 2014 | 3 | — |
| +1 | K132752 | Ultracongruent Insert | United Orthopedic Corporation | 2014 | 5 | — |
| +1 | K131864 | U2 Tibial Baseplate- Cma Type, Tibial Insert and Augment | United Orthopedic Corporation | 2014 | 5 | — |
| +1 | K131398 | Novoknee Total Knee System | Novosource, Inc. | 2013 | 10 | — |
| +1 | K123339 | TK1 Total Knee System | Novosource, Inc. | 2013 | 11 | — |
| +1 | K120507 | United U2 Femoral Component, PS, #7 | United Orthopedic Corporation | 2012 | 4 | 1 |
| +1 | K103733 | United U2 Xpe Total Knee System | United Orthopedic Corporation | 2011 | 8 | 2 |
| +1 | K082424 | United U2 Total Knee System | United Orthopedic Corp. | 2008 | 15 | 2 |
| +1 | K082469 | United U2 Patella | United Orthopedic Corp. | 2008 | 0 | — |
| +2 | K261032 | NovoKnee (SteriKnee) | NovoSource | 2026 | 0 | — |
| +2 | K252725 | Stem Extension Line (U2 Total Knee System—PSA Type) | United Orthopedic Corporation | 2025 | 0 | — |
| +2 | K242410 | NextStep Arthropedix Total Knee System | Nextstep Arthropedix | 2025 | 0 | — |
| +2 | K231975 | PNK Total Knee System | Tjc Life Co., Ltd. | 2023 | 0 | — |
| +2 | K221705 | U2 Total Knee System-PF+ | United Orthopedic Corporation | 2023 | 1 | — |
| +2 | K210695 | CPM Medical Consultants Tibial Revision Knee System | Cpm Medical Consultants, LLC | 2021 | 0 | — |
| +2 | K210961 | U2 Total Knee System, XPE Tibial Insert, PS PLUS | United Orthopedic Corporation | 2021 | 0 | — |
| +2 | K190100 | USTAR II System | United Orthopedic Corporation | 2019 | 2 | 5 |
| +2 | K190355 | Precision Casting Solutions Total Knee System | Precision Casting Solutions, Inc. | 2019 | 0 | — |
| +2 | K183344 | The Progressive Orthopaedic Company Total Knee System II | The Progressive Orthopaedic Company, LLC | 2019 | 0 | — |
| +2 | K183225 | Stabil Orthopaedic Solutions Total Knee System | Stabil Orthopaedic Solutions, LLC | 2019 | 0 | — |
| +2 | K182370 | Acculoc Total Knee System | Rootloc Co., Ltd. | 2018 | 0 | — |
| +2 | K181146 | ASK System | L and K Biomed Corporation Limited | 2018 | 0 | — |
| +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 | K150832 | U2 Femoral Component, CR, Porous Coated, Additional Sizes | United Orthopedic Corporation | 2015 | 2 | — |
| +2 | K150783 | Progressive Orthopaedic Total Knee System | The Progressive Orthopaedic Company, LLC | 2015 | 8 | — |
| +2 | K131116 | U2 Total Knee System - Psa Type, Offset Stem Adapter | United Orthopedic Corporation | 2013 | 0 | — |
| +2 | K122183 | Augment and Screw, Psa Type | United Orthopedic Corp. | 2013 | 10 | — |
| +2 | K100981 | United Stem, Psa Type | United Orthopedic Corp. | 2010 | 3 | — |
| +3 | K252303 | Stem Extension Line (USTAR II System) | United Orthopedic Corporation | 2025 | 0 | — |
| +3 | K243656 | U2 Total Knee System – PF+ Patella; USTAR II System– PF+ Patella | United Orthopedic Corporation | 2025 | 0 | — |