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[Syndesmosis transfixation screw].

R Kadletz¹, K P Benedetto

¹Universitäts-Klinik für Unfallchirurgie Innsbruck.

Aktuelle Traumatologie

|August 1, 1990

Summary

A fibular tibial transfixation screw stabilizes the distal tibiofibular joint. Proper placement and engagement of the medial tibial cortex are crucial for screw biomechanical integrity during load-bearing activities.

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Area of Science:

Orthopedic Surgery
Biomechanics
Anatomy

Background:

Distal tibiofibular joint instability is a common complication following fibular fractures.
Anatomical reconstruction of the fibula may not always restore tibiofibular stability.
Transfixation screws are utilized to augment stability in these cases.

Purpose of the Study:

To define the optimal placement and technique for fibular tibial transfixation screws.
To elucidate the biomechanical requirements for effective screw fixation in the distal tibiofibular joint.

Main Methods:

Review of anatomical landmarks for screw insertion.
Description of recommended screw trajectory and depth.
Analysis of biomechanical principles governing screw fixation in the tibiofibular syndesmosis.

Main Results:

The fibular tibial transfixation screw should be positioned 2 cm proximal to the anterior syndesmosis.
The recommended insertion angle is 30 degrees upward from dorsal in the frontal plane.
Engagement of the medial tibial cortex is imperative for screw stability under load.

Conclusions:

Precise placement and technique are essential for successful fibular tibial transfixation screw fixation.
Engaging the medial tibial cortex ensures the screw can withstand biomechanical forces during ambulation.
This technique enhances the stability of the distal tibiofibular joint following injury or reconstruction.

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