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Published in: BMC Musculoskeletal Disorders 1/2020

Open Access 01-12-2020 | Knee Dislocation | Case report

Effectiveness of circular hexapod external fixation with soft tissue reconstruction in treating severe knee dislocation due to burn scarring: a case report

Authors: Koji Nozaka, Naohisa Miyakoshi, Hidetomo Saito, Hiroaki Kijima, Motoki Mita, Yoichi Shimada

Published in: BMC Musculoskeletal Disorders | Issue 1/2020

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Abstract

Background

Severe varus deformity and soft tissue injury caused by a burn around a complex knee dislocation is a rare injury. Soft tissue reconstruction and deformity correction with circular hexapod external fixation of the knee and hinged total knee arthroplasty (TKA) are challenging and can lead to major complications if not performed appropriately. We present a case in which a combination of soft tissue reconstruction, circular hexapod external fixation, and TKA was used treat severe knee dislocation due to burn scarring.

Case presentation

We report the case of a 58-year-old woman who presented for knee surgery with soft tissue reconstruction, deformity correction with circular hexapod external fixation, and hinged TKA for a severe complex deformity and soft tissue injury caused by a burn injury at 6 months of age. The left leg was shorter by 35 mm in terms of functional leg length discrepancy. She walked with a limp, with a marked varus deformity of the left knee during the stance phase of walking. After a 3-stage repair, the patient was able to walk without assistance, confirming improvement of mobility.

Conclusion

The treatment method was an effective use of a combination of soft tissue reconstruction, circular hexapod external fixation, and rehearsal surgery using a 3D printed bone model of the modular rotating hinge component of TKA, which was successfully used to treat a severe knee dislocation due to burn scarring. This staged surgery maintained the leg length and ultimately achieved a satisfactory alignment.
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Metadata
Title
Effectiveness of circular hexapod external fixation with soft tissue reconstruction in treating severe knee dislocation due to burn scarring: a case report
Authors
Koji Nozaka
Naohisa Miyakoshi
Hidetomo Saito
Hiroaki Kijima
Motoki Mita
Yoichi Shimada
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2020
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-020-03667-7

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