# P940002: Natural-Knee (R) and Natural Knee (R)II W/Csti (TM)

- Pathway: PMA
- Applicant: Sulzermedica
- Decided: Mar 21, 1997 after 1,162 days
- Product code: MBD (Prosthesis, Knee, Patello/Femorotibial, Unconstrained, Uncemented, Porous, Coated, Polymer/Metal/Polymer)
- Device class: 3
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
145 later devices descend from it; 2 cite it directly.
0 of 146 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. PMA decisions do not claim a predicate device.

## Most influential descendants
- K070214: Gender Solutions Natural-Knee Flex System (2007), 123 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
- K140833: Itotal Posterior Stabilized (PS) Knee Replacement System (2014), 26 descendants of its own

Source page: https://510kreport.com/device/P940002
Methodology: https://510kreport.com/methodology