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Minimal invasive surgery (MIS)is accepted when the scar is10 cm or less. The anterior and the antero-lateralapproaches had gained recently interest in the total hiparthroplasty because they allow complete muscle sparing.The postero-lateral and lateral approaches were propsed tobe less satisfactory from this point of view.The goal of thispaper was to report an objective and carfull assessment ofthe advantages of the minimal invasive posteriorapproach in short stem (Nanos) total hip arthroplasty.Material and methods: From juli 2005 to march 2009 a totalof 113 (70 males,53 female) uncemented Nanos-short-stemprothesis were implanted in 111 patients.The patiensaverage age was 53 years (33-73 ). The indication for thisprocedure was predominantly coxarthrosis. In all cases aminimal invasive posterior approach was used. The meanfollow up period was 2,5 years (range 6 months- 4,5 years).The patients were assessed using Harris Hip Score andradiologically to detect any bone changes , the stand of theprothesis and peri-articular ossificationsResults: The perioperative Harris Hip Score was 53 (28-77), postoperative was 94 ( 86-100). Untill now we havenot discovered any prothesis specific complications.Radiological follow up examinations showed thedevelopment of increasing trabecular reinforciment of thefemoral neck and pertrachanteric regions. There is noevidence of any loosing or migration of the prothesis.Noluxation. Calcification was noted in 8 cases (Grad 1), 4cases(Grad 2), 1 case (Grad 3). In 3 cases we have to changethe cup because of malpositionConclusion: the stem design of Nanos-short-stem prothesisallowed a metaphyseal intertrochanteric multipointprimary fixation . The surgical technique using posteriorapproach give a good access to the femur and acetabulum .It allows intraoperative ROM as well as extention in theevent of intraopertive complications. Long term studies stillbe needed.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]