J Korean Orthop Assoc.  2007 Jun;42(3):360-365. 10.4055/jkoa.2007.42.3.360.

A Comparative Study between High-Flex and Non High-Flex TotalKnee Arthroplasty

• Moon JS
• Yu KS
• Ha CW

• KMID: 2186561
• DOI: http://doi.org/10.4055/jkoa.2007.42.3.360

Abstract

PURPOSE: The purpose of this study was to compare the clinical results of a high-flex design (Scorpioflex(R), Stryker) in total knee arthroplasty with those of a non-high-flex design (Scorpio(R) PS type, Stryker).
MATERIALS AND METHODS
Fifty-two knees with at least 120 degrees of further flexion preoperatively underwent total knee arthroplasty. Of the 52 knees, there were 35 knees in the high-flex design (HF group) and 17 knees in the non high-flex design (non-HF group). The clinical results were evaluated by postoperative further flexion at 3 months, 6 months, 1 year, 2 years and 3 years, as well as by Delta flexion, which means postoperative flexion improvement. The Knee Society Score and X-rays were evaluated preoperatively and at the 3-year follow-up.
RESULTS
The HF group showed significantly greater flexion than the non-HF group at 3 months postoperatively (p=0.000). The delta flexion was also greater in the HF group at 3 months postoperatively (p=0.000). The Knee Society Score and X-rays were similar in the two groups at the final follow-up (p>0.05).
CONCLUSION
High-flex total knee arthroplasty appears to facilitate greater flexion in the first 3 months postoperatively, but there is no significant difference between both groups with regard to the range of motion, clinical and radiographic variables after 3 months.

Keyword

Knee; High-flex design; Total knee arthroplasty

MeSH Terms

Arthroplasty*
Follow-Up Studies
Knee
Range of Motion, Articular

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