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논문 기본 정보

자료유형
학술저널
저자정보
Choi Yun Seong (Department of Orthopaedic Surgery Veterans Health Service Medical Center Seoul Korea.) Park Jung-Wee (Department of Orthopaedic Surgery Seoul National University Bundang Hospital Seongnam Korea.) Kim Tae Woo (Department of Orthopedic Surgery Seoul Metropolitan Government-Seoul National University Boramae Medical Center Seoul Korea.Department of Orthopaedic Surgery Seoul National University College of Medic) Kang Kee Soo (Department of Orthopedic Surgery Seoul National University Hospital Seoul Korea.) Lee Young-Kyun (Department of Orthopaedic Surgery Seoul National University Bundang Hospital Seongnam Korea.Department of Orthopaedic Surgery Seoul National University College of Medicine Seoul Korea.) Koo Kyung-Hoi (Department of Orthopaedic Surgery Seoul National University Bundang Hospital Seongnam Korea.Kay Joint Center Cheil Orthopaedic Hospital Seoul Korea.) Chang Chong Bum (Department of Orthopaedic Surgery Seoul National University Bundang Hospital Seongnam Korea.Department of Orthopaedic Surgery Seoul National University College of Medicine Seoul Korea.)
저널정보
대한의학회 Journal of Korean Medical Science Journal of Korean Medical Science Vol.38 No.20
발행연도
2023.5
수록면
1 - 13 (13page)
DOI
10.3346/jkms.2023.38.e148

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초록· 키워드

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Background: This study aimed to 1) assess the effect of total hip arthroplasty (THA) on coronal limb alignment, namely, the hip–knee–ankle angle (HKA), 2) identify factors that determine changes in the HKA, and 3) determine whether alignment changes influence the knee joint space width. Methods: We retrospectively evaluated 266 limbs of patients who underwent THA. Three types of prostheses with neck shaft angles (NSAs) of 132°, 135°, and 138° were used. Several radiographic parameters were measured in the preoperative and final radiographs (at least 5 years after THA). A paired t-test was used to confirm the effect of THA on HKA change. Multiple regression analysis was performed to identify radiographic parameters related to HKA changes following THA and changes in knee joint space width. Subgroup analyses were performed to reveal the effect of NSA change on the HKA change, and the proportion of total knee arthroplasty usage and changes in radiographic parameters between maintained joint space and narrowed joint space groups were compared. Results: The preoperative mean HKA was 1.4° varus and increased to 2.7° varus after THA. This change was related to changes in the NSA, lateral distal femoral angle, and femoral bowing angle. In particular, in the group with a decrease in NSA of > 5°, the preoperative mean HKA was largely changed from 1.4° varus to 4.6° varus after THA. The prostheses with NSA of 132° and 135° also led to greater varus HKA changes than those with an NSA of 138°. Narrowing of the medial knee joint space was related to changes in the varus direction of the HKA, decrease in NSA, increase in femoral offset. Conclusion: A large reduction in NSA can lead to considerable varus limb alignment after THA, which can have adverse effects on the medial compartment of the ipsilateral knee.

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