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Published in: Archives of Orthopaedic and Trauma Surgery 9/2017

01-09-2017 | Arthroscopy and Sports Medicine

Effects of initial graft tension on femoral tunnel widening after anatomic anterior cruciate ligament reconstruction using a bone–patellar tendon–bone graft

Authors: Shuji Taketomi, Hiroshi Inui, Keitaro Tahara, Nobuyuki Shirakawa, Sakae Tanaka, Takumi Nakagawa

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 9/2017

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Abstract

Introduction

The effects of initial graft tension upon tunnel widening (TW) following anatomic anterior cruciate ligament (ACL) reconstruction have not been elucidated. The purpose of this study was to retrospectively investigate the effect of two different graft-tensioning protocols upon femoral TW following anatomic ACL reconstruction using a bone–patellar tendon–bone (BPTB) graft and a three-dimensional (3D) computed tomography (CT) model.

Methods

Forty-three patients who underwent isolated ACL reconstruction using BPTB grafts were included in this study. In 18 out of the 43 patients, the graft was fixed at full knee extension with manual maximum pull (Group H). These patients were compared with 25 patients in whom the BPTB graft was fixed at full knee extension with 80-N pull (Group L). Tunnel aperture area was measured using 3D CT 1 week and 1 year postoperatively, thus enabling us to calculate the percentage change in the area of femoral tunnel aperture. Clinical assessment was performed 1 year postoperatively, corresponding to the time period of CT assessment, and involved the evaluation of Lysholm score, anterior knee stability using a KneeLax3 arthrometer, and the pivot-shift test.

Results

When measured at 1 year postoperatively, the mean area of the femoral tunnel aperture had increased by 78.6 ± 36.8% in Group H when compared with at 1 week postoperatively, whereas that of Group L had increased by 27.7 ± 32.3%. Furthermore, TW (%) in Group H was significantly greater than that of Group L (P < 0.001). No significant differences were detected between the two groups with regard to any of the clinical outcomes evaluated.

Conclusion

High levels of initial graft tension resulted in greater TW of the femoral tunnel aperture following anatomical ACL reconstruction using BPTB grafts. However, such levels of graft tension did not affect clinical outcome.
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Metadata
Title
Effects of initial graft tension on femoral tunnel widening after anatomic anterior cruciate ligament reconstruction using a bone–patellar tendon–bone graft
Authors
Shuji Taketomi
Hiroshi Inui
Keitaro Tahara
Nobuyuki Shirakawa
Sakae Tanaka
Takumi Nakagawa
Publication date
01-09-2017
Publisher
Springer Berlin Heidelberg
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 9/2017
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-017-2728-5

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