Ontology type: schema:ScholarlyArticle Open Access: True
2012-12-29
AUTHORSYuichiro Nishizawa, Tomoyuki Matsumoto, Seiji Kubo, Hirotsugu Muratsu, Takehiko Matsushita, Shinya Oka, Kazunari Ishida, Tokio Matsuzaki, Kotaro Nishida, Toshihiro Akisue, Ryosuke Kuroda, Masahiro Kurosaka
ABSTRACTPurposeAlthough the patella reduced or everted position has recently been recognised as an important factor influencing soft tissue balance during assessment in total knee arthroplasty (TKA), the influence of patella height on soft tissue balance has not been well addressed. Therefore, the relationship between soft tissue balance and patella height was investigated and differences between cruciate-retaining (CR) and posterior-stabilised (PS) TKA were compared.MethodsForty consecutive patients blinded to the type of implant received, were randomised prospectively. Using lateral radiographs, pre-operative patella height was measured. Using an offset-type tensor designed to measure the soft tissue balance with a reduced patellofemoral (PF) joint and femoral component in place, soft tissue balance was intra-operatively assessed in CR TKA (n = 20) and PS TKA (n = 20) in osteoarthritic patients. The joint component gap and varus ligament balance at zero, ten, 45, 90 and 135° of knee flexion with the patella reduced were measured.ResultsIn PS TKA, the joint component gap positively correlated with patella height at 90 and 135° of knee flexion. However, there was no correlation between joint component gap and patella height at other flexion angles in PS TKA and any flexion angle in CR TKA. Varus ligament balance showed no significant correlation with patella height in either CR or PS TKA.ConclusionAnalysis of soft tissue balance and patella height only showed a positive correlation in joint component gap at a high flexion angle (90 and 135°) in PS TKA but not in other parameters examined. Pre-operative measurement of patella height may be an important factor for predicting an intra-operative flexion gap in PS TKA. More... »
PAGES421-425
http://scigraph.springernature.com/pub.10.1007/s00264-012-1749-5
DOIhttp://dx.doi.org/10.1007/s00264-012-1749-5
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/23275081
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