Open Access, Peer-reviewed
pISSN 1226-2102
eISSN 2005-8918
    J Korean Orthop Assoc. 2007 Feb;42(1):71-76. Korean.
    Published online Feb 28, 2007.
    https://doi.org/10.4055/jkoa.2007.42.1.71
    Copyright © 2007 The Korean Orthopaedic Association
    Original Article

    Cruciate Retaining Medial Pivot Knee

    Dae Kyung Bae, M.D., Kyoung Ho Yoon, M.D., Seon Goo Kim, M.D.,* and Kyoung Jun Park, M.D.
      • Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea.
      • *Department of Orthopaedic Surgery, Bucheon Sejong Hosiptal, Bucheon, Korea.
    • Address reprint requests to Dae Kyung Bae, M.D. Department of Orthopaedic Surgery, Kyung Hee University Hospital, 1, Hoegi-dong, Dongdaemun-gu, Seoul 130-702, Korea. Tel: +82.2-958-8366, Fax: +82.2-964-3865, Email: bdkyung@khmc.or.kr

    Abstract

    Purpose

    To analyze the clinical and radiographic results of patients who underwent total knee arthroplasty with a posterior cruciate retaining medial pivot knee, and to identify the technical aspects in preserving the posterior cruciate ligament.

    Materials and Methods

    From March 2002 to Dec 2003, 40 total knee arthroplasties with a cruciate retaining medial pivot knee were implanted in 28 cases. The average follow-up period was 2.8 years (range, 2 to 3.7 years). The clinical and radiographic results were evaluated using the clinical and roentgenographic evaluation and scoring system of the American Knee Society.

    Results

    The average flexion contracture before surgery was 5.4°, which improved to 0.6° at the last follow-up. The average preoperative knee flexion was 126.1° and 126.6° at the last follow-up. The average knee score improved from 60 points preoperatively to 94.8 points postoperatively, and the average functional score improved from 55.3 points to 87.0 points at the final evaluation. The average post operative α, β, γ and δ angles were 95.1°, 91.1°, 3.6° and 84.0°, respectively. There were no postoperative complications.

    Conclusion

    The short term clinical results in patients who had undergone total knee arthroplasty with a cruciate retaining medial pivot knee was acceptable.

    Keywords
    Knee; Posterior cruciate ligament; Arthroplasty; Medial pivot knee

    Figures

    Fig. 1
    The roentgenographic evaluation and scoring system of the American Knee Society is shown.

    Fig. 2
    The surgical techniques are shown. (A) The femoral alignment guide was externally rotated more than 4 degrees relative to the posterior condylar axis. (B) For adequate ligament balancing and good implant tracking, adequate posterior cruciate ligament release was performed. (C) The posterior slope was checked using tibial alignment guide. On this photograph, adequate posterior slope was obtained.

    Tables

    Table 1
    The Angle of the Implant Position (Degrees)

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    MeSH Terms
    Arthroplasty
    Contracture
    Follow-Up Studies
    Humans
    Knee*
    Posterior Cruciate Ligament
    Postoperative Complications
    Metrics
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