# K904448: Townley Total Knee (TTK)

- Pathway: 510(k) (Traditional)
- Applicant: Biopro, Inc.
- Decided: Jul 17, 1991 after 292 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.
20 later devices descend from it; 6 cite it directly.
0 of 21 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
- K141471: Journey II XR Knee System (2014), 12 descendants of its own
- K152315: JOURNEY II Uni Tibial Base and Insert (2015), 8 descendants of its own
- K190085: Journey II Unicompartmental Knee System (2019), 7 descendants of its own
- K122160: Vanguard XP Knee System (2013), 6 descendants of its own
- K152726: JOURNEY II XR Knee System (2015), 4 descendants of its own

Source page: https://510kreport.com/device/K904448
Methodology: https://510kreport.com/methodology