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KMID : 0361620110460020114
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Journal of the Korean Orthopaedic Association
2011 Volume.46 No. 2 p.114 ~ p.121
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Outcome of Isolated Tibial Polyethylene Insert Exchange after Total Knee Arthroplasty
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Chun Churl-Hong
Kim Jeong-Woo
Kweon Seok-Hyen
Choi Byong-San
Chun Keun-Churl
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Abstract
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Purpose: We investigated the short term outcomes of isolated tibial polyethylene insert exchange after revision total knee arthroplasty.
Materials and Methods : We selected 18 cases from 17 patients among the 20 cases from 19 patients who took isolated tibial polyethylene insert exchange after mean 69 months-follow up of TKA, which was carried out from June 1991 to August 2003. Two cases were excluded on account of loss to follow-up. In all cases, isolated tibial polyethylene insert exchange was carried out from May 1998 to October 2008 in our institute and the mean follow-up period after operation was 48 (22-142) months. We evaluated the following clinical and radiologic aspects: range of motion, HSS score, average labor time, and BMI. Together, these factors were used in clinical evaluation while femorotibial angle and radiolucent line were used in radiologic evaluation.
Results: The average range of motion was 110.6 degrees and HSS score was 86.9 in follow up period. The average femorotibial angle was valgus 5.3°. The average labor time was 9.7 hours and BMI was 25.9. Although radiolucent line was found in 4 cases, there were all confirmed to be non progressive lesion less than 2 mm. Survival rate was 100% in Kaplan-Meier survival analysis.
Conclusion: Selective isolated tibial polyethylene insert exchange can be the successful method for revision TKA in limited cases.
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KEYWORD
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revision total knee arthroplasty, polyethylene insert exchange
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