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Poster: 5Flexion-Extension Gaps Configuration in Revision Knee Arthroplasty*Andrea Baldini - . - Prato, ItalyLorenzo Castellani - IFCA Clinic - Florence, ItalyLuca Manfredini - IFCA Clinic - Florence, Italy*Email: drbaldiniandrea@yahoo.itGaps balancing during revision knee arthroplasty is a fundamental step of the procedure.Mismatch between flexion and extension must be addressed with different technical solutionsinvolving prosthetic components modularity. The purpose of the study was to quantify flexionand extension gaps mismatch in revision knee arthroplasty.A consecutive series of 46 revision knee arthroplasty performed between January 2006 and May2009 was intraoperatively evaluated for gaps measurements. A tensiometer device was utilizedwith a torque wrench of 40 pounds. Measurements were taken after components were removedand soft tissue debridement performed (Fig1). Revisions were septic in 26% of the cases.Gaps measured, on average, 27 mm (range: 23-33) in extension, and 32 mm (range: 24-38) inflexion. In 87% of the cases flexion gap was larger than the extension gap (Fig2, 3). In thesecases, space in flexion was larger, on average, of 5mm (range 2-15 mm). Only one case had anextension gap larger than flexion gap, and in 5 cases there was no mismatch. Medial-lateralgaps symmetry was present only in 17% of the cases. Medial gap was larger than lateral in 46%of the cases. A larger lateral gap than medial gap was found in 37% of the cases.The most frequent gaps scenario in revision knee arthroplasty is flexion large and extensionnormal. The second most frequent scenario is flexion very large and extension large.Occasionally, gaps can be equal or larger in extension. The surgeon should be ready, duringrevision TKA, to frequently manage a larger flexion gap compared to the extension gap.FiguresFigure 1 Figure 2 Figure 3Poster: 6The Use of Modular Endoprosthesis for Tumors of the Proximal Femur*Ayman Bassiony - Ain Shams University - Cairo, Egypt*Email: aymanbassiony@yahoo.comfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]