# K183312: Conformity Stem

- Pathway: 510(k) (Traditional)
- Applicant: United Orthopedic Corporation
- Decided: Aug 8, 2019 after 252 days
- Product code: LZO (Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented)
- Device class: 2
- Regulation: 21 CFR 888.3353
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 6 generations back to K935452 (1994). 16 ancestors in all.
3 later devices descend from it; 3 cite it directly.
0 of 20 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K042992: Corail Amt Hip Prosthesis, DePuy Orthopaedics, Inc. (2005) Summary page 4.

## Most influential descendants
- K242249: Conformity Stem Extension Line (2024), 1 descendant of its own
- K242315: Resolve Modular Revision Hip Stem (2025), 0 descendants of its own
- K243466: Conformity Stem Extension Line, #0 (2025), 0 descendants of its own

## Indications for use
The device is indicated for use in hip arthroplasty in skeletally mature patients with the following conditions: 1. A severely painful and/or disabled joint from osteoarthritis, traumatic arthritis, rheumatoid arthritis, or congenital hip dyplasia. 2. Avascular necrosis of the femoral head. 3. Acute traumatic fracture of the femoral head or neck. 4. Failed previous hip surgery including joint reconstruction, internal fixation, arthrodesis, hemiarthroplasty, surface replacment or total hip replacement. 5. Certain cases of ankylosis. Conformity stem is for cementless use only.

Source page: https://510kreport.com/device/K183312
Methodology: https://510kreport.com/methodology