Devices descending from K222516
3 later devices reach Mercury® II Spinal System through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K243916 | Primus Spinal Fixation System | Spinal Elements, Inc. | 2025 | 2 | — |
| +2 | K251154 | RIVA Posterior Fixation System; RIVA Posterior Fixation System Navigation Instruments | Ht Medical D.B.A. Xenix Medical | 2025 | 1 | — |
| +3 | K262193 | RIVA® Posterior Fixation System with NanoACTIV Surface Technology; RIVA® Anchor… | Xenix Medical | 2026 | 0 | — |