# K912663: Natural-Knee Ultra Congruent Tibial Insert

- Pathway: 510(k) (Traditional)
- Applicant: Intermedics Orthopedics
- Decided: Sep 16, 1991 after 90 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: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
53 later devices descend from it; 2 cite it directly.
0 of 54 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known.

## Most influential descendants
- K090705: Balanced Knee System Ultracongruent Tibial Insert (2009), 42 descendants of its own
- K112906: Klassic Knee System (2012), 33 descendants of its own
- K140942: Klassic Knee Tibial Stem Extension (2014), 27 descendants of its own
- K153310: Klassic Knee System (2015), 24 descendants of its own
- K153075: Klassic Knee System (2015), 24 descendants of its own

Source page: https://510kreport.com/device/K912663
Methodology: https://510kreport.com/methodology