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Abstract:Functional Relevance of Patellofemoral Thickness Before and AfterUnicompartmental Patellofemoral Replacement.*Ali Mofidi - Wake Forest University Baptist Medical Centre - Winston-Salem, USAS Badaja - ABM Swansea health trust - Swansea, UKMark Holt - ABM swasea hospital trust - Swansea, UKAndrew Davies - ABM Swansea health trust - swansea, UK*Email: alimofidi@hotmail.comThe aim of this study was to assess the increase in the anterior diameter of the knee and theimpact of this increase on the range of motion and function of the knee.Twenty-eight patients (34 knees) who underwent Patello-femoral replacement with FPV(Wright Medical) prosthesis between 2005 and 2009 who were identified retrospectively andanalyzed using chart and radiological review. Oxford and AKSS knee-scores were gatheredprospectively pre-operative and at follow-up.Trochlear height was measured using lateral radiograph. Trochlear height was compared pre andpostoperatively. Patellar height was also measured in preoperative and postoperative skylineview and was compared. The range of movement at six weeks and the Oxford and Americanknee society knee scores at six months postoperatively were noted. Association betweenincreased anterior height and improved range of motion was studied.All but three-knees regained full knee extension. Postoperative mean range of flexion of theknee joint was 116 degrees. The mean Oxford knee and the mean American Knee Society KneeScores significantly improved post-operativelyThe trochlear height was increased by 4mms. Patellar height was also increased by 3 mmsresulting in average total increase of 7 mms in the anterior-posterior diameter of the knee. Wefound no relationship between range of motion of the knee and the increase in the anteriorposteriordiameter. We found a negative correlation between increase in the antero-posteriorand preoperative trochlear and patellar height.We conclude that FPV Patello-femoral replacement results in correct anatomical reconstructionof the trochlear height rather than ‘overstuffing’ of the patellofemoral joint which can lead tostiffness and failure of resolution of pain post-operatively. This should in turn result in durableimprovements in pain and function.Friday, October 8, 2010, 16:30-17:30Session B15: MIS Techniques in TKAEffect of Arthritis in the Other Compartments on the Outcome AfterUnicompartemental Arthroplasty (Makoplasty)*Ali Mofidi - Wake Forest University Baptist Medical Centre - Winston-Salem, USAfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]