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efore and after the operation according to the Knee Society Scoring System. The mobilebearinggroup had an average age of 65 and 34 months' follow-up; in the fixed-bearing groupthe average age was 69 and the average follow-up 30 months.Results: The average knee score in the mobile-bearing group rose from 29 to 64 while in thefixed-bearing group the score changed from 31 to 68. The average functional score moved from45 to 67 in the mobile-bearing group and from 34 to 57 in the fixed-bearing group. The averageoverall score, for the fixed-bearing group, moved from 65 to 125 and in the mobile-bearinggroup from 75 to 128.Conclusion: In both groups the average knee/functional knee scores increased after theoperation and all patients were happy with the results, however statistically there was nomeaningful relationship between pre-and post-operation scores. So regarding to our findings,there is no preference between these two types of prosthesis.Key Words: Total Knee Arthroplasty, Mobile-Bearing Prosthesis, Fixed-Bearing Prosthesis,Knee Society Score.Friday, October 8, 2010, 11:10-11:50Session A13: Alternate Bearing Materials in ArthroplastyMinimum 5 Year Results for Modular Metal on Metal THA*Kirk Kindsfater - Orthopaedic Center of the Rockies - Fort Collins, United StatesChristi Terefenko - Arthritis and Joint Replacement Center of Readin - Womissing, UnitedStatesChris Bureau - Orthopaedic Center of the Rockies - Fort Collins, United StatesCindy Sherman - Orthopaedic Center of the Rockies - Fort Collins, United States*Email: kkindsfater@msn.comModular Metal on Metal THA – Minimum 5 Year ResultsIntroductionMetal on metal hip bearings (MoM) are under scrutiny. Short and mid-term complicationsattributed to metal wear debris have been reported. Distinctions between MoM prostheses exist.Thus, generalizing findings from one design to another is questionable. This study reportsminimum 5 yr. Pinnacle TM modular MoM results.MethodsBetween September 2001 and October 2004, 95 consecutive MoM THAs were performed byone surgeon in a prospective cohort design. Mean age was 53 yrs (range 34-70); 57 were male.Mean BMI was 29 (range 20-46). OA was noted in 87 patients. Head size was 28mm in 3 and36mm in 92. Surgical approach was postero-lateral in all patients . Harris Hip Score (HHS),WOMAC, ROM and radiographs were evaluated preoperatively, at 6-months, and yearlythereafter.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]