# K100857: Fusion Medical Ring Lock System

- Pathway: 510(k) (Traditional)
- Applicant: John J Riccio
- Decided: May 27, 2010 after 62 days
- Product code: KTT (Appliance, Fixation, Nail/Blade/Plate Combination, Multiple Component)
- Device class: 2
- Regulation: 21 CFR 888.3030
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to K831576 (1983). 5 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 7 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K052196: Vilex X-Fix, Vilex, Inc. (2005) Summary page 1.

## Most influential descendants
- K200343: FusionFrame Ring Lock System (2020), 0 descendants of its own

## Indications for use
Stabilization of fractures & Osteotomy Bone deformity correction of lower extremities Arthrodesis of the rear foot, mid foot, and ankle joint. Limb lengthening in pediatric and adults.

Source page: https://510kreport.com/device/K100857
Methodology: https://510kreport.com/methodology