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KMID : 0361620100450060426
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Journal of the Korean Orthopaedic Association
2010 Volume.45 No. 6 p.426 ~ p.432
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Short-Term Outcomes of Miller Galante® Fixed-Bearing Unicondylar Knee Arthroplasty: A Comparative Study in Outcomes according to Postoperative Correction Angle
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Jung Woo-Bin
Song Eun-Kyoo
Seon Jong-Keun
Park Sang-Jin
Seo Chang-Young
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Abstract
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Purpose: To evaluate short-term clinical and radiographical results of fixed bearing unicondylar knee arthroplasty (UKA) comparing results between over-corrected group and under-corrected group.
Materials and Methods : Clinical and radiographical outcomes of 47 Miller-Galante® UKAs with a minimum of 4-year follow-up were evaluated. We also compared both clinical and radiographical results between over and under corrected groups, which were divided by 2˚ varus of mechanical axis postoperatively.
Results: HSS and WOMAC scores improved from 75.4 and 57.7 preoperatively to respectively, 95.2 and 12.1 at the last follow up. Radiographically, the mechanical axis changed from 7.2˚ varus preoperatively to 2.8˚ varus at the last follow-up. A partial radiolucent line on the medial side of the tibia was observed in 23% of the 47 cases. Degenerative changes in the lateral compartment and the patellofemoral joint were observed, respectively, in 23% and 26%. There were no significant differences between the two groups in clinical and radiographical results (p>0.05). In the undercorrected group, three cases converted to total knee arthroplasty because of medial tibial collapse.
Conclusion: Miller-Galante® UKA showed good outcomes in short-term follow-up with the exception of three failures. There were no significant differences between more than 2˚ varus corrected and under 2o varus corrected groups in clinical and radiographical results. However, all 3 conversions to total knee arthroplasties occurred in the undercorrected group.
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KEYWORD
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degenerative osteoarthritis, fixed bearing, unicondylar knee arthroplasty
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