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KMID : 0361620070420060730
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Journal of the Korean Orthopaedic Association
2007 Volume.42 No. 6 p.730 ~ p.736
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Total Knee Arthroplasty with NexGen(R) System - 3-8 Year Follow-up Results-
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Jung Kwang-Hwan
Cho Sung-Do
Ko Sang-Hun
Cha Jae-Ryong
Lee Chae-Chil
Youm Yoon-Seok
Park Ki-Bong
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Abstract
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Purpose: To evaluate the 3 to 8 year follow-up clinical and radiological results after NexGenⓡ total knee arthroplasty (TKA).
Materials and Methods: Ninety-six knees in 75 patients, who could be followed up more than 3 years after NexGenⓡ TKA [cruciate retaining (CR) type:34, posterior cruciate substituting (PS) type:62] from March 1997 to May 2002, were evaluated retrospectively. The evaluations included the preoperative and postoperative range of motion (ROM), Knee Society Score (KSS), knee functional score, tibiofemoral angle and postoperative complications.
Results: The ROM increased from preoperative mean flexion contracture of 9.3° and further flexion of 116.4° to a postoperative mean flexion contracture of 2.1° and further flexion of 126.3° (ROM: 124.2°). The ROM of CR type improved from 112.7° to 123.1°, and the PS type improved from 105.3° to 124.9° (p＞0.05). The KSS and knee function score improved from 54 and 41 before surgery to 94 and 87 after surgery, respectively (p＞0.05). The tibiofemoral angle changed from preoperative varus 5.7° to postoperative valgus 5.2°. The complications were two cases of infection and two cases of early loosening.
Conclusion: The 3 to 8 year follow-up results after NexGenⓡ TKA were satisfactory in both the CR and PS types. However, a longer term follow-up evaluation will be necessary.
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KEYWORD
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NexGen (R) TKA, Cruciate retaining, Cruciate substituting
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