# K011830: Tri-Fix Spinal Fixation System

- Pathway: 510(k) (Traditional)
- Applicant: Endius, Inc.
- Decided: Jul 23, 2001 after 41 days
- Product code: KWP (Appliance, Fixation, Spinal Interlaminal)
- Device class: 2
- Regulation: 21 CFR 888.3050
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
582 later devices descend from it; 1 cites it directly.
1 of 583 devices in its family (counting itself) has a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. The FDA summary names its predicate without a number.
- (no number) ISOLA Spinal System: named in the summary without a submission number

## Most influential descendants
- K021335: Monarch Spine System (2002), 581 descendants of its own
- K024348: Monarch Spine System (2003), 578 descendants of its own
- K052131: Expedium Spine System 5.5MM Commerically Pure Titanium Spinal Rods (2005), 495 descendants of its own
- K062174: Modification to Expedium Spine System (2006), 490 descendants of its own
- K063156: Modification to Expedium Spine System (2006), 424 descendants of its own

## Indications for use
The TriFix Spinal System is indicated for degenerative disc disease (defined as discogenic back pain with degeneration of the disc confirmed by history and radiographic studies). Levels of fixation are for the thoracic, lumbar, and sacral spine. The Tri-Fix Spinal System is a pedicle screw system intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of the thoracic, lumbar, and sacral spine: degenerative spondylolisthesis with objective evidence of neurologic impairment, fracture, dislocation, scoliosis, kyphosis, spinal tumor, and failed previous fusion (pseudoarthrosis). The posterior Tri-Fix Spinal System is also indicated for pedicle screw fixation for severe spondylolithesis (grades 3 and 4) at .5-S1, in skeletally mature patients, when autogenous bone graft is used, when affixed to the posterior lumbosacral spine, and intended to be removed after solid fusion is attained. Levels of fixation are from L3-S1. The posterior Tri-Fix System, when not used with pedicle screws is indicated for hook, wire, and/or sacral screw fixation from T1 to the ilium sacrum. The non-pedicle screw indications are spondylolithesis, degenerative disc disease, (defined as discogenic back pain with degeneration of the disc confirmed by history and radiographic studies), deformities (scoliosis, lordosis and kyphosis), tumor, fracture, and previous failed fusion surgery.

Source page: https://510kreport.com/device/K011830
Methodology: https://510kreport.com/methodology