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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 12/2018

01-12-2018 | Knee

Interference screw insertion angle has no effect on graft fixation strength for insertional Achilles tendon reconstruction

Authors: Ziying Wu, Hongyun Li, Shiyi Chen, Kui Ma, Shengkun Li, Peng Zhang, Yinghui Hua

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2018

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Abstract

Purpose

To compare the effect of two interference screw insertion angles on the biomechanical properties of the insertional Achilles tendon (IAT) reconstruction.

Methods

Nine matched pairs of fresh-frozen human cadaveric Achilles tendon specimens were randomized to two groups with interference screw insertion angles of 60° and 120°. The IAT reconstruction was performed by fixing the graft tendon with the interference screw. Each specimen was loaded to failure. The load at failure, stiffness, and mode of failure were documented. Differences in load at failure and stiffness were analysed.

Results

There was no statistically significant difference between the 60° and 120° groups for failure load (149.137 ± 20.836 versus 155.428 ± 28.343 N, respectively, n.s.) and stiffness (14.523 ± 2.824 N/mm versus 14.727 ± 2.192 N/mm, respectively, n.s.). The most common mode of failure was the graft pulling out of the bone tunnel when the screw broke.

Conclusions

Graft fixation at two different interference screw insertion angles for IAT reconstruction exhibited equivalent biomechanical performance. When performing this procedure, surgeons may choose the interference screw insertion angle based on personal preference.
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Metadata
Title
Interference screw insertion angle has no effect on graft fixation strength for insertional Achilles tendon reconstruction
Authors
Ziying Wu
Hongyun Li
Shiyi Chen
Kui Ma
Shengkun Li
Peng Zhang
Yinghui Hua
Publication date
01-12-2018
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2018
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-018-4864-z

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