J Korean Orthop Assoc.  2010 Dec;45(6):426-432. 10.4055/jkoa.2010.45.6.426.

Short-Term Outcomes of Miller Galante(R) Fixed-Bearing Unicondylar Knee Arthroplasty: A Comparative Study in Outcomes according to Postoperative Correction Angle

Affiliations
  • 1Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Jeonnam, Korea. eksong@jnu.ac.kr

Abstract

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(R) 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 2degrees 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 7.2degrees varus preoperatively to 2.8degrees 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(R) UKA showed good outcomes in short-term follow-up with the exception of three failures. There were no significant differences between more than 2degrees varus corrected and under 2degrees varus corrected groups in clinical and radiographical results. However, all 3 conversions to total knee arthroplasties occurred in the undercorrected group.

Keyword

degenerative osteoarthritis; fixed bearing; unicondylar knee arthroplasty
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