External Fixation System

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DYNEX® TRIAD

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DYNEX® TRIAD is a dedicated external fixation system designed to address bony and soft tissue defects and deformities through an advanced clinical approach.

Transverse Tibial Transport (TTT)

A limb-salvage surgical technique used to support healing in severe diabetic foot ulceration through distraction-induced angiogenesis and microvascular remodeling.

Published outcomes from TTT procedures in recalcitrant diabetic foot ulcers report wound healing rates of 92–96% at one-year follow-up, with amputation rates of 1.9–4.9% — compared to a lifetime amputation rate of 15–20% in conventionally managed DFU.1,2,3

TECHNIQUE
Tibial Cortex Transverse Transport
FOCUS
Limb Salvage / Perfusion Support

Surgical Principle

A unicortical medial tibial bone window is created and gradually transported laterally over approximately two weeks before being returned to its original position.

Mechanism of Action

Controlled distraction is believed to stimulate angiogenesis, collateral vessel formation, and improved microvascular perfusion to the distal extremity.

Clinical Context

TTT has been described as an adjunctive limb-salvage strategy in patients with severe diabetic foot ulceration and compromised tissue perfusion.

Comparative Clinical Outcomes

18-month comparative outcomes of TTT versus PRP in patients with severe DFU.

1. Chen Y, et al. Effect of tibial cortex transverse transport in patients with recalcitrant diabetic foot ulcers: a prospective multicenter cohort study. J Orthop Translat. 2022;36:194-204.
2. Yuan Y, et al. Tibial cortex transverse transport accelerates wound healing via enhanced angiogenesis and immunomodulation. Bone Joint Res. 2022;11(4):189-199.
3. Efficacy of tibial cortex transverse transport in treating diabetic foot ulcer. Diabetol Metab Syndr. 2024;16:160.
Features
DYNEX Integration
Progress Scale & Indicator Dots
Bone Transport, Simplified
Pre-assembled fixator designed for quick fixation. MIS Corticotomy Guide for fast, reproducible results and minimal soft tissue envelope disruption.
Techniques
The DYNEX® TRIAD system has three available techniques that can be used in procedure: Flap, MIS, and Freehand.
Integrated with DYNEX®
TRIAD can be used as a standalone device or in conjunction with the DYNEX® External Fixation system, half pins, rings, and accessories, for increased stability during transport.
Progress Scale & Movement
TRIAD features a total running distance of 10mm. Movement progress is indicated by the integrated scale along the front of the fixator. Movement is shown from 0-10mm in 1mm increments for precise progress readings.
Indicator Dots
Adjustment Knob rotates both clockwise for distraction and counter-clockwise for compression.
Each quarter turn results in 0.25mm adjustments, and features indicator dice to confirm the adjustment. 1.0mm of adjustment is possible per full revolution.

DYNEX® TRIAD

EXTERNAL FIXATION SYSTEM
Pin Options
Transport Pins
Lengths
Thread Tip Lengths
80mm
10 mm
130mm
10mm
Half Pins
Diameter
Thread Tip Lengths
4.5mm
25-55mm
6.0mm
25-55mm

Resources

Sales Sheet

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Surgical Technique

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DYNEX® TRIAD EXTERNAL
FIXATION SYSTEM


DYNEX® TRIAD is a dedicated external fixation system designed to address bony and soft tissue defects and deformities through an advanced clinical approach.

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