# K002356: Natural-Knee II Patellofemoral Joint Prosthesis

- Pathway: 510(k) (Traditional)
- Applicant: Sulzer Orthopedics, Inc.
- Decided: Oct 30, 2000 after 89 days
- Product code: KRR (Prosthesis, Knee, Patello/Femoral, Semi-Constrained, Cemented, Metal/Polymer)
- Device class: 2
- Regulation: 21 CFR 888.3540
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
143 later devices descend from it; 2 cite it directly.
0 of 144 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K070695: Zimmer Patellofemoral Joint Prosthesis (2007), 122 descendants of its own
- K073286: Gender Solutions Natural-Knee Flex System (2008), 117 descendants of its own
- K113369: Zimmer Persona Knee System (2012), 96 descendants of its own
- K121771: Zimmer Persona the Personalized Knee System (2012), 59 descendants of its own
- K053488: Conformis Bicompartmental Knee Repair System (2006), 35 descendants of its own

Source page: https://510kreport.com/device/K002356
Methodology: https://510kreport.com/methodology