J Korean Orthop Assoc.  2007 Feb;42(1):71-76. 10.4055/jkoa.2007.42.1.71.

Cruciate Retaining Medial Pivot Knee

• Bae DK
• Yoon KH
• Kim SG
• Park KJ

• KMID: 2106378
• DOI: http://doi.org/10.4055/jkoa.2007.42.1.71

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 5.4degrees, which improved to 0.6degrees at the last follow-up. The average preoperative knee flexion was 126.1degrees and 126.6degrees 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 alpha, beta, gamma and delta angles were 95.1degrees, 91.1degrees, 3.6degrees and 84.0degrees, 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.

Keyword

Knee; Posterior cruciate ligament; Arthroplasty; Medial pivot knee

MeSH Terms

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

Figure

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

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  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.

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