Der einfluss der femur- und tibiakomponentenrotation auf das patellofemorale versagen beim künstlichen kniegelenkersatz

Translated title of the contribution: Effect of rotation of the femoral and tibial components on patellofemoral malalignment in knee arthroplasty

H. Kienapfel*, H. P. Springorum, A. Ziegler, K. J. Klose, C. Georg, P. Griss

*Corresponding author for this work
24 Citations (Scopus)

Abstract

Patellofemoral complications are among the most common causes for revision surgery in total knee arthroplasty. So far no quantitative assessment has been made of the femoral and tibial malalignment or the positioning of the patellar component and the type of patellofemoral complication or failure. In particular, no comparative studies are available that include patients with and without patellofemoral failure in respect to the above-mentioned parameters when implant material, implant design, and fixation technique were identical. Between 1985 and 1992, 171 MGI total knee arthroplasties were performed. Since 1999, 20% of all the implanted MGI knee arthroplasties (all with metal-backed patellar component) had to be revised. Of those 34 patients, 18 were pair matched with 18 control patients based on the criteria of sex, body mass index, and age. The only difference in the control group was that they did not suffer any malfunction of the patellofemoral mechanism. To assess the patella component localization, conventional AP radiographs, patellar merchant view radiographs in 30°, and CT scans were performed. This study has demonstrated a significant difference for the thickness of the patellar component and a trend regarding the rotational malalignment of the tibial component. Potential causes for the malrotation and guidelines to prevent rotational malalignment are discussed.

Translated title of the contributionEffect of rotation of the femoral and tibial components on patellofemoral malalignment in knee arthroplasty
Original languageGerman
JournalOrthopade
Volume32
Issue number4
Pages (from-to)312-318
Number of pages7
ISSN0085-4530
DOIs
Publication statusPublished - 01.04.2003

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