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KMID : 0359619940060020152
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Journal of Korean Knee Society
1994 Volume.6 No. 2 p.152 ~ p.157
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Comparison of Patellar Stability in MG I and MG II Total Knee Arthroplasty
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Jung Su-Il
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Abstract
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Authors compared the patellofemoral complications in Miller-Galate I and Miller-Galante II to know the cause and method of teatment of it. During the time between 1986 and 1988 we performed 68 knees of MG I. Since 1991 we performed 98 knees o f
MGII.
We performed lateral retinacular release in only 5 out of 68 MG I knees(7.4%0 and in 86 out of 98 MG II knees987.8%). In MG I symptomatic lateral subluxation of the patella occurred in 3 cases94.4%) and asymptomatic lateral subluxation occured in
15 knees(12.5%). Mild initial lateral tilting of the patella occurred in 39 knees(44.1%). So altogether 48 knees out of 68 MG I(70.6%) knees shlowed some abnormality in patelofemoral articulations. There was no patellofemoral joint abnormality in
case of lateral retinacular release. In MG II no case showed patellofemoral articulation abnormality in X-ray. The indication of the lateral retinacular release in MG I was decided with ＂no thumbs technique＂(static). However, since many cases showed
lateral patellar subluxation during initial 20-60 degree flexion although this phenomenon disappeared in more than 90 degree flexion lateral retinacular release was performed even in those cases in MG II(dynamic).
The main cause of patellofemoral subluxaxion seemed to be shallow groove, thicker anterior flange of the component than removed bone. From these results it would be suggested that the thickness of the anterior flange should be decreased, the
patellofemoral groove should be deepened and the indication of the lateral retinacular release should be made in dynamic condition intraoperatively.
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KEYWORD
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