# K122232: GMK Narrow

- Pathway: 510(k) (Special)
- Applicant: Medacta International
- Decided: Sep 28, 2012 after 64 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
Longest line of descent: 12 generations back to K941847 (1994). 88 ancestors in all.
8 later devices descend from it; 3 cite it directly.
0 of 96 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K090988: GMK Total Knee System, Medacta International S.A. (2009) Summary page 1.
- K120790: GMK - Line Extension, Medacta International (2012) Summary page 1.

## Most influential descendants
- K142069: GMK Extension (2014), 4 descendants of its own
- K202684: GMK Total Knee System - TiNbN Coating (2020), 3 descendants of its own
- K131310: GMK Full PE Tibial Components (2013), 2 descendants of its own
- K210010: GMK Revision & Hinge Extension - TiNbN Coating (2021), 1 descendant of its own
- K262057: GMK Extension (2026), 0 descendants of its own

## Indications for use
The GM4K knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components. This knee replacement system is indicated in the following cases: *Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis. *Avascular necrosis of femoral condyle. *Post traumatic loss of joint configuration. *Primary implantation failure. Tibial augments are to be attached to the tibial baseplate with both the fixing cylinders and bone cement. In case a semi-constrained liner is used, an extension stem must be implanted both on the tibial and on the femoral components.

Source page: https://510kreport.com/device/K122232
Methodology: https://510kreport.com/methodology