J Korean Orthop Assoc.  2009 Dec;44(6):581-585. 10.4055/jkoa.2009.44.6.581.

Comparative Study of the Postoperative Maximal Flexion Angle in PCL-substituting TKAs: Conventional PS vs. High-flex PS

• Choi CH
• Koo MH
• Park YW

• KMID: 2186282
• DOI: http://doi.org/10.4055/jkoa.2009.44.6.581

Abstract

PURPOSE
This study was performed to compare the postoperative maximal flexion angle (MFA) of standard PCL-substituting (PS) prosthesis with that of high-flexion PS prosthesis after total knee arthroplasty (TKA).
MATERIALS AND METHODS
A total of 81 patients (133 knees) were enrolled in this study. Sixty-eight primary bilateral TKAs were performed in 34 consecutive patients. The bilateral TKAs were performed in a staged sequential manner, with a standard PS prosthesis in one knee and a high-flexion PS prosthesis in the contralateral knee. We also analyzed the results of another 47 patients as several control groups, and this consisted of standard or high-flexion PS total knee prostheses in the bilateral TKAs, and standard or high-flexion PS total knee prostheses in the unilateral TKAs. The patients were clinically assessed with the Knee Society scoring system and the MFA was measured with a goniometer.
RESULTS
At the last follow up, the mean postoperative MFA of the 34 patients operated with the combination of different prostheses was 131.6+/-10.4degrees for high-flexion prosthesis side and 131.6+/-9.5degrees for standard prosthesis side respectively. There was no statistically significant difference. On comparing with the results of the 47 patients in the control group, no statistically significant difference in the mean postoperative MFA was found between the groups.
CONCLUSION
We found no significant differences between the high-flexion PS prosthesis and the standard PS prosthesis in the postoperative MFA.

Keyword

Knee; Total knee arthroplasty; High-flexion implant; Maximal flexion angle

MeSH Terms

Arthroplasty
Follow-Up Studies
Humans
Knee
Knee Prosthesis
Prostheses and Implants

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