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from 48.6 to 92.2, while functional scores improved from 50 to 81.1Conclusion: We believe that maintaining this anatomic landmark allows for preserved patellarstrength, and in association with a femoral component with a recessed trochlear groove, hasresulted in our low patellar fracture rate in primary TKR and revision cases for patellarosteolysis.Thursday, October 7, 2010, 17:30-18:00Session A9: Arthroplasty OutcomesThe Royal National Orthopaedic Hospital Experience With Custom Made(CADCAM) Total Hip Replacement in Patients WithOsteochondrodysplasia*Baljinder Dhinsa - Royal National Orthopaedic Hospital - Stanmore, United KingdomAzal Jalgaonkar - Royal National Orthopaedic Hospital Stanmore - Stanmore, United KingdomZuhair Nawaz - Royal National Orthopaedic Hospital - Stanmore, United KingdomTim Briggs - . - London, UKSarah Muirhead-Allwood - Royal National Orthopaedic Hospital - Stanmore, United KingdomRichard Carrington - Royal National Orthopaedic Hospital - London, UKJohn Skinner - Royal National Orthopaedic Hospital Trust - Stanmore, UKGeorge Bentley - Royal National Orthopaedic Hospital - Stanmore, United KingdomJonathan Miles - Royal National Orthopaedic Hospital - London, UK*Email: bsd14@hotmail.comPatients with osteochondrodysplasia frequently require Total Hip Arthroplasty at a younger age,as a result of early degenerative disease of the hip joint. The outcome of Modular Total HipArthroplasty in this group of patients has been reported previously. In this retrospective studywe evaluated the outcome of custom made (CADCAM) Total Hip Arthroplasty in patients withosteochondrodysplasia.Between 1974 and 2009, twenty one CADCAM Total Hip Arthroplasty procedures wereperformed in fourteen patients in our institution. There were eight female and six male patients,with the mean age at time of surgery of 40.95 years (20 to 78). The patients were followed upclinically and with the Harris hip score for a mean of 7.12 years (0.5 to 17 years).Four of the twenty-one hips (23.8%) required revision surgery at a mean of 11.54 years (6.5 to17 years); one required it for aseptic loosening of the femoral component; one requiredcomplete revision of the acetabular component ; one required exchange of acetabular liner; andone was for symptomatic non-union of a lesser trochanter avulsion.This study shows encouraging clinical outcomes of custom made (CADCAM) Total HipArthroplasty in patients with osteochondrodysplasia,file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]