# K002379: M2A 28MM Ringloc Liner

- Pathway: 510(k) (Special)
- Applicant: Biomet, Inc.
- Decided: Aug 31, 2000 after 27 days
- Product code: KWA (Prosthesis, Hip, Semi-Constrained (Metal Uncemented Acetabular Component))
- Device class: 3
- Regulation: 21 CFR 888.3330
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
146 later devices descend from it; 5 cite it directly.
0 of 147 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
- K033634: Epsilon Metasul 32MM Acetabular Inserts, Standard and Hooded (2004), 76 descendants of its own
- K053536: Durom Acetabular Component and Metasul LDH Large Diameter Heads (2006), 74 descendants of its own
- K071723: Zimmer Porolock Mis Stem (2008), 73 descendants of its own
- K093235: Ringloc + Hybrid Acetabular System (2010), 65 descendants of its own
- K121874: G7 Acetabular System (2012), 53 descendants of its own

Source page: https://510kreport.com/device/K002379
Methodology: https://510kreport.com/methodology