Devices descending from K100981
3 later devices reach United Stem, Psa Type through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K190100 | USTAR II System | United Orthopedic Corporation | 2019 | 2 | 5 |
| +2 | K252303 | Stem Extension Line (USTAR II System) | United Orthopedic Corporation | 2025 | 0 | — |
| +2 | K243656 | U2 Total Knee System – PF+ Patella; USTAR II System– PF+ Patella | United Orthopedic Corporation | 2025 | 0 | — |