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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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The tripod fixation technique for ankle arthrodesis.

John M Schuberth¹, John A Ruch, Sigvard T Hansen

¹Foot and Ankle Surgery, Department of Orthopedic Surgery, Kaiser Foundation Hospital, San Francsico, CA 94118, USA. Jmfoot@aol.com

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons

|December 27, 2008

Summary

This study presents a novel tripod screw fixation technique for ankle arthrodesis, enhancing stability and minimizing complications. This method ensures robust compression and reduces the risk of hardware issues and bone stress fractures.

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Area of Science:

Orthopedic surgery
Biomechanical engineering
Surgical fixation techniques

Background:

Ankle arthrodesis commonly utilizes compression screws for fixation.
Existing methods may face challenges with stability and hardware-related complications.

Purpose of the Study:

To introduce a mechanically sound and stable fixation technique for ankle arthrodesis.
To describe a novel screw configuration that optimizes compression and minimizes surgical risks.

Main Methods:

A tripod spatial orientation for screws was employed to achieve circumferential compression.
A specific sequence for hardware delivery was developed to prevent intraosseous screw collision.
Strategic screw placement was utilized to avoid stress concentration in the distal tibia.

Main Results:

The tripod configuration provides stable fixation and circumferential compression across the ankle fusion mass.
The delivery sequence effectively minimizes the risk of intraosseous screw collision.
Strategic placement prevents stress risers, enhancing the mechanical integrity of the distal tibia.

Conclusions:

The presented tripod screw fixation technique offers a mechanically sound and stable solution for ankle arthrodesis.
This method improves fixation stability, reduces hardware complications, and enhances bone integrity.
This approach represents a significant advancement in surgical techniques for ankle fusion.