PMID: 11905560Mar 22, 2002Paper

Arch-shaped versus flat arthrodesis of the ankle joint: strength measurements using synthetic cancellous bone

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Henrik Lauge-PedersenK E Tanner

Abstract

The aim of this study was to see if preservation of the arch shape of the ankle at arthrodesis contributes to stability. The ankle joint was simulated by paired blocks of a synthetic material corresponding to rheumatoid cancellous bone with low stiffness and strength. Flat end constructs with and without subchondral bone were compared with arch-shape constructs with and without subchondral bone. The pairs were fixed with two screws simulating an arthrodesis. These constructs were then tested to failure in four-point bending and torque. In four-point bending the subchondral bone increased the strength, regardless of shape. Stiffness was higher in the arch-shaped specimens but was not influenced by the subchondral bone. In torque, both arch-shape and subchondral bone increase the strength. Stiffness was increased by arch-shape but not subchondral bone. The results imply that the arch-shape and subchondral bone should be preserved when performing an ankle arthrodesis, especially in weak rheumatoid bone.

References

Jun 1, 1994·Foot & Ankle International·R L FriedmanJ A Nunley

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Citations

Mar 19, 2003·Acta Orthopaedica Scandinavica. Supplementum·Henrik Lauge-Pedersen
Dec 3, 2004·Foot & Ankle International·Ana Alonso-VázquezMark Taylor
May 9, 2014·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Roel P M HendrickxGino M M J Kerkhoffs
Jan 14, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Peter A J de LeeuwGino M M J Kerkhoffs

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