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• W4280514643 abstract "Abstract Background: The postoperative clinical outcomes has been extensively demonstrated to largely correlate with the coronal alignment after total knee arthroplasty (TKA). However, in different studies, either the hip-knee-ankle angle (HKA) on a full-length radiograph or the femorotibial angle (FTA) on a short knee film was used to categorize the postoperative coronal alignment. Meanwhile, several different FTA ranges were regarded as neutral alignment in different studies. As a result, it is still unknown that how FTA on short knee films and HKA related to each other. Methods : 223 patients were included in this study and standard weight-bearing short knee films as well as full-length radiographs were acquired. The pre- and postoperative FTA, as well as the postoperative anatomical lateral distal femoral angle (aLDFA) and anatomical medial proximal tibial angle (aMPTA) were measured on short knee films by two orthopedic surgeons independently. On full-length films, the pre- and postoperative FTA, the pre- and postoperative HKA, as well as the postoperative mechanical lateral distal femoral angle (mLDFA) and mechanical medial proximal tibial angle (mMPTA) were also recorded by two other surgeons independently. Results : A good linear relationship between the postoperative FTA and HKA were demonstrated (r=0.86). The concordant classifications were reached 82.7%, 71.0%, and 68.2% of all patients using three previously reported FTA ranges. When analyzing the independent alignment of the tibial tray and the femoral component, 84.1% and 57.9% of all patients was reached an agreement on the classification. Conclusions : In most occasions, the consistence between the FTA and HKA in assessing the overall coronal alignment of the lower extremity and the tibial component is satisfactory. However, the postoperative full-length film is still needed to evaluate accurately measure the coronal alignment of the femoral component." @default.
• W4280514643 created "2022-05-22" @default.
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• W4280514643 date "2022-05-19" @default.
• W4280514643 modified "2023-09-24" @default.
• W4280514643 title "Using short knee radiographs to predict the coronal alignment after TKA: is it an accurate proxy for HKA on full-length images?" @default.
• W4280514643 doi "https://doi.org/10.21203/rs.3.rs-1666172/v1" @default.
• W4280514643 hasPublicationYear "2022" @default.
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