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five females. The pre-operative diagnosis was primary osteoarthritis in 90% of patients andrheumatoid arthritis in 10% (two knees out of twenty). The average follow up was 39 month (from 27 to 57 month). Legacy Constrained Condylar Prosthesis (modular constrained knee ofZimmer) was used in all cases with stemmed both tibial and femoral components.ResultsAt the final follow up with average 39 month, the average KSSS was improved from 31 to 89.5.The function knee score was improved from 40 to 80. The tibio-femoral angle improved fromaverage 26° To 8° postoperative. All patients (100%) achieved medio-lateral stability with lessthan 5° varus-valgus laxity.ConclusionConstrained condylar knees function well in patients with severely deformed knees requiringprimary TKA especially in elderly and low demanding patients. This study does notrecommend and against the use of constrained implants in younger active patients with highphysical demands.FiguresFigure 1 Figure 2Thursday, October 7, 2010, 15:40-16:00Session A7: Hip 2Conservative Postero-Lateral Approach to Hip. Evaluation of 500 Cases.*Fabrizio Pace - NIGUARDA HOSPITAL - Milano, ITALYFabrizio Pace - university of milan - milan, italy*Email: pace.fabrizio@fastwebnet.itThe Gibson and Moore postero-lateral approach is one of the most often used in hipreplacement. The advantage of this approach is an easy execution but it’s criticized because ofits invasivity to muscle-tendinous tissues especially on extrarotators muscles and because ofpredisposition to posterior dislocation.Since June 2003 we executed total hip replacements using a modified postero-lateral approachwhich allows to preserve the piriformis and quadratus femoris muscles and to detach just theconjoint tendon (gemelli and obturator internus). Articular capsule is preserved and it will beanatomically sutured at the end of the procedure as well as the conjoint tendon with twotransossesous sutures. Piriformis and quadratus femoris muscles result untouched by thisapproach.We have executed 500 surgeries with this modified approach.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]