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논문 기본 정보

자료유형
학술저널
저자정보
Kitagawa Atsushi (Orthopaedic Surgery Hyogo Rehabilitation Center Hospital Kobe Japan) Yamamoto Junya (Orthopaedic Surgery Hyogo Rehabilitation Center Hospital Kobe Japan) Toda Mitsunori (Orthopaedic Surgery Hyogo Rehabilitation Center Hospital Kobe Japan) Hashimoto Yasushi (Orthopaedic Surgery Hyogo Rehabilitation Center Hospital Kobe Japan)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.15 No.1
발행연도
2021.1
수록면
9 - 16 (8page)

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Study Design: Prospective cohort study.Purpose: This study aims to examine changes in spinopelvic alignment, sagittal global balance, and low back pain (LBP) following the removal of knee flexion contracture by total knee arthroplasty (TKA).Overview of Literature: The limitation of the knee extension was correlated with the decrease in lumbar lordosis (LL). Currently, there are no studies evaluating the spinopelvic alignment and LBP before and after TKAs.Methods: Sagittal spinopelvic alignment was evaluated in 110 subjects using radiographs of the whole spine. Parameters measured in this study included sagittal vertical axis (SVA), LL, sacral slope (SS), pelvic tilt (PT), and pelvic incidence (PI). The distribution of sagittal plane modifier grade was evaluated according to the Scoliosis Research Society-Schwab classification of adult spinal deformity (ASD). Consequently, personal history related to LBP was obtained, and the association of pre- and postoperative LBP and spinopelvic alignment was investigated.Results: Preoperatively, 66% of all subjects showed LBP and mostly exhibited anteriorly shifted global imbalance associated with a decrease in LL and knee flexion contractures, and the subject who had severe flexion contracture of the knee joint showed more forwardly shifted global balance with backward PT and decrease in LL. After TKAs, the knee flexion contractures were eliminated in most cases, and one-third of subjects experienced decrease in LBP. However, SVA increased more and associated with slight decrease of PT and increase of SS. No significant differences were confirmed between pre- and postoperative values of LL and PI. In addition, there were no significant differences in postoperative values of spinopelvic parameters between subjects with and without relieved LBP.Conclusions: Although one-third of subjects experienced decrease of LBP after TKAs, the sagittal global imbalance was not restored through the removal of knee flexion contracture.

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