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lactide interference screw in anterior cruciate ligament surgery and in future if there will bemore reports about such complication, it will be a place for debating bio screws usage.Poster: 68Change of the Femoral Offset (FO) and CCD Angle After Implantation theShort-Stem Prothesis in Total Hip Arthroplasty*Khalaf Moussa - Westpfalz Teaching Hospital - Kusel, Germany*Email: kmoussa@gmx.deBackground:The relationship between the femral offset(FO) and the abductor moment arm andthe polyethylene wear ,loosening ,instability,persistant limp due to gluteus mediusinsufficiency, even dislocation ,leg discripancy are well known. The short stem prothesis arerecently itroduced as a bone saving procedure which allows later easy and save revision. Incontrast to modular neck system which proved to be useful for the correction of antevertedfemur ,the short stem prothesis did not posses this advantage which may consequently affect thelong term results of the prothesis .We study the influence of using a short stem series (NANOS-Smith and Nephew)on the hip geometry concerning the offset and CCD angle change after implantationMaterial and methods: From juli 2005 to march 2009 a total of 113 (70 males,53female) uncemented Nanos-short-stem prothesis were implanted in 100 patients.The patiensaverage age was 53 years (33-73 ). The indication for this procedure was predominantlycoxaarthrosis. In all cases a minimal invasive posterior approach was used. The patients wereassessed using Harris Hip Score and radiologically (true ap-axial) to determine CCD angle,Offset, any bone changes , the stand of the prothesis and peri-articular ossifications. Thecontralateral hip was used as a parameter. Patients with severe osteoarthritis ,malformations orprevious operation were excluded from the study.Results: The perioperative Harris Hip Score was 53 (28-77), postoperative was 94 (86-100).Radiological follow up examinations showed an increased femoral neck offset preoperative50.01mm (39-68),postoperative 55.8 (42-72). Also the value of CCD angle changed and inmost cases were associated with increased angle.There is no evidence of any loosing ormigration of the prothesis. Calcification was noted in 8 cases (Grad 1), 4 cases(Grad 2), 1 case(Grad 3). No luxation was observed.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]