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KMID : 0361620070420030360
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Journal of the Korean Orthopaedic Association
2007 Volume.42 No. 3 p.360 ~ p.365
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A Comparative Study between High-Flex and Non High-Flex Total Knee Arthroplasty
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Moon Jeong-Seok
Yu Kun-Sik
Ha Chul-Won
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Abstract
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Purpose : The purpose of this study was to compare the clinical results of a high-flex design (Scorpioflexⓡ, Stryker) in total knee arthroplasty with those of a non-high-flex design (Scorpioⓡ 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.
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KEYWORD
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Knee, High-flex design, Total knee arthroplasty
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