• Arch Orthop Trauma Surg · Dec 2024

    Comparative Study

    Bi-cruciate stabilized total knee arthroplasty restores the native knee alignments better than conventional posterior stabilized total knee arthroplasty.

    • Seong Yun Park, Joon Hee Cho, Hee Seung Nam, Jade Pei Yuik Ho, and Yong Seuk Lee.
    • Department of Orthopaedic Surgery, Seoul National University College of Medicine, Bundang Hospital, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-707, South Korea.
    • Arch Orthop Trauma Surg. 2024 Dec 12; 145 (1): 3131.

    IntroductionThis study aimed to compare the differences in the radiological, clinical, and functional outcomes and the estimated restoration rate of native knee alignment between total knee arthroplasty (TKA) with bi-cruciate stabilized (BCS) and posterior stabilized (PS) design.Materials And MethodsThis retrospective study included consecutive patients between 2020 and 2021 who underwent TKA. The patients were divided into two groups (group I, Journey II BCS TKA [106 knees]; group II, Persona PS TKA [106 knees]) after 1:1 propensity score matching. We assessed the radiologic parameters in the coronal (constitutional hip-knee-ankle angle [aHKA] and joint line obliquity [JLO]), sagittal, and axial planes. The femoral roll-back, clinical, and functional outcomes were evaluated. The joint perception was evaluated using the forgotten joint score (FJS).ResultsGroup I had a higher restoration rate of aHKA and JLO postoperatively (P = 0.039 and P < 0.001). The changes in the patella tendon angle, posterior overhang of the femur, patella tilt angle, and patella lateral shift in group II were larger than those in group I (P < 0.001). Group I was superior in the range of motion (ROM) (P = 0.004), femoral roll-back (P < 0.001), and FJS (P = 0.021).ConclusionsBCS TKA demonstrated better restoration of native knee alignments, including constitutional coronal knee alignment and native sagittal knee alignment, and lesser patella lateral shift than conventional PS TKA. In addition, BCS TKA was superior in ROM, femoral roll-back, and joint perception, which were associated with the degree of restoration of constitutional coronal knee alignment.Level Of EvidenceLevel III, retrospective cohort study.© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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