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

BMC Musculoskeletal Disorders

Naohisa Miyakoshi¹  Hidetomo Saito¹  Koji Nozaka¹  Yoichi Shimada¹  Motoki Mita¹  Hiroaki Kijima¹ 

[1] Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, 010-8543, Akita, Japan;

关键词: Soft tissue reconstruction;    Circular hexapod external fixation;    Hinged total knee arthroplasty;   

DOI  :  10.1186/s12891-020-03667-7

来源: Springer

【 摘 要 】

BackgroundSevere 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 presentationWe 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.ConclusionThe 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.

【 授权许可】

CC BY