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Revision Hip Arthroplasty for Type IIIB Femoral Defects Using a Modular,Tapered Femoral Component*Michael Ryan - Kaiser Permanente - San Diego, UsaJames Fait - Kaiser Permanente - carlsbad, usaAmir Khan - TIOS - southlake, usaGlenn Barnes - Kaiser Permanente - LaJolla, usa*Email: mgryanmd@aol.comPurpose: In revision hip surgery, Type IIIB femurs have presented the greatest historicalchallenge to achieving stable fixation and osseous integration. This study evaluated theintermediate term outcome of a modular, tapered, distal fixation revision femoral componentused in a consecutive revision hip series with special attention to its performance in thedefective Type IIIB femur.Methods: Between February 2002 and January 2005, 51 consecutive revision hip arthroplastieswere performed using modular, tapered, distal fixation femoral components. The femoraldefects at the time of revision surgery were classified using a system previously described byPaprosky. The most recent radiographs were reviewed and clinic notes examined to assessfemoral component stability.Results: At a minimum of 4.2 years and a mean of 5.8 years follow-up, 2 patients were lost tofollow-up. Revision cases classified by the Paprosky femoral defect classification systemincluded 14 Type IIIB hips (28%). All hips reviewed (100%) had radiographic evidence ofbony ingrowth. No stem migrated more than 2mm. There were no failures at the modularjunction and no component disassociation.Conclusion: A modular, tapered distal fixation femoral component had a 100% survival rate atmean 5.8 year follow-up after revision surgery. All femoral components showed successfulosseous-integration. The ability with modularity to independently place the diaphyseal segmentof a femoral component in the best remaining femoral host bone may have provided the greatestopportunity for osseous-integration. In this consecutive revision hip series there was no instanceof modular junction fracture or component related failure in cases with minimal or no proximalbone support.Thursday, October 7, 2010, 14:20-15:00Session B6: Computer Navigation in TKR 2OrthoPilot Navigated Total Knee Replacement- Technical Tips*Ranjan Sachdev - Central Kansas Medical Center - Great Bend, USA*Email: sachdevr01@gmail.comfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]