# K904208: Kinemax Superstabilizer Total Knee System

- Pathway: 510(k) (Traditional)
- Applicant: Howmedica Corp.
- Decided: Apr 1, 1991 after 201 days
- Product code: JWH (Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer)
- Device class: 2
- Regulation: 21 CFR 888.3560
- Recalls of this device: 1 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
1 later device descends from it; 1 cites it directly.
0 of 2 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
- K963242: Duracon Posterior Femoral Spacer (1996), 0 descendants of its own

## Recalls of this device
- Feb 27, 2015 · Class II · Z-1614-2015: Stryker received four customer complaints reporting that inside the box labeled part #6476-8-260 (Kinemax Stem Extenders, 80 mm) there was a different part #6476-8-250 (Kinemax Stem Extenders, 40 mm.

Source page: https://510kreport.com/device/K904208
Methodology: https://510kreport.com/methodology