# K021826: Trilogy Acetabular System Constrained Liner, Model 6154 Series

- Pathway: 510(k) (Traditional)
- Applicant: Zimmer, Inc.
- Decided: Dec 20, 2002 after 199 days
- Product code: KWZ (Prosthesis, Hip, Constrained, Cemented Or Uncemented, Metal/Polymer)
- Device class: 2
- Regulation: 21 CFR 888.3310
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to P960054 (1997). 1 ancestor in all.
16 later devices descend from it; 1 cites it directly.
0 of 18 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- P960054: S-Rom Poly-Dial Constrained Liner, Depuy, A Johnson & Johnson Co. (1997) Summary page 1.

## Most influential descendants
- K023794: Constrained Liner (2003), 15 descendants of its own
- K112158: Modulus Stems, Modulus Necks, Modular Femoral Heads, Cemented Cups, Lock Bipolar Heads (2012), 13 descendants of its own
- K141327: Minima S System (2014), 5 descendants of its own
- K152903: REVIVAL (TM) Modular Revision Hip Stem (2016), 4 descendants of its own
- K140975: Mastersl Femoral Stem (2014), 4 descendants of its own

## Indications for use
The Trilogy Constrained Liner is indicated for either cemented or noncemented use as a component of a total hip prosthesis in primary or revision patients at high risk of hip dislocation due to a history of prior dislocation, bone loss, soft tissue laxity, neuromuscular disease, or intraoperative instability and for whom all other options to constrained acetabular components have been considered.

Source page: https://510kreport.com/device/K021826
Methodology: https://510kreport.com/methodology