Roentgenographic Study of the Patellofemoral Joint at an Early Stage after Miller/Galante Total Knee Arthroplasty.

概要

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Incongruity of the patellofemoral joint is seen rarely after Miller/Galante total knee arthroplasty. The purpose of this study was to determine the association between the component patellar positioning and the congruity of the patellofemoral joint in the early stage following total knee arthroplasty.In regard to placement of the patellar component, the mean prosthsis-bone angle was 2.9° and mean prosthesis positioning was -2.1mm. In patellofemoral joint congruity, the mean patellar tilt and mean patellar position were 2.1° and 0.46, respectively. Multiple regression analysis showed that patellar tilt and patellar position were due to the prosthesis-bone angle, prosthesis positioning, preoperative tilting angle of the patella, difference between preoperative FTA and postoperative FTA and lateral release. There was a close correlation especially between the congruity of the patellofemoral joint and placement of the patellar component.The results observed in this study suggest that correct placement of the patellar component is necessary to obtain more correct congruity of the patellofimoral joint in the early stages following Miller/Galante total knee arthroplasty.
西日本整形・災害外科学会の論文