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In the present study, the patella higher group showed significant larger component gaps than thepatella lower group at high flexion angles (90, 135 degree). This result suggests that smallerpressure on extensor mechanism of the patella higher group has led to larger component gaps athigher flexions. In conclusion, pre-operative measurement of ISI can help surgeons predictintra-operative soft tissue balance.Thursday, October 7, 2010, 8:30-9:20Session B2: Knee Arthroplasty in the Indian Sub ContinentA 11 to 14 Year Follow-Up Study of the Rotaglide Mobile*Yasuo Kunugiza - Osaka University - Suita City, JapanTetsuya Tomita - - ,*Email: kunugiza@ort.med.osaka-u.ac.jpWe report long term outcomes of the Rotaglide mobile bearing total knee arthroplasty (RTK).(Method) Between 1995 and 1998, 61 RTK prostheses were implanted at our institutionconsecutively. Of 34 knees with a median duration to end of follow up of 13.0 years (range 11.4to 14.2 years), the clinical result using Knee Society Score and radiological analysis using KneeSociety Roentgenographic Sytstem was evaluated.(Result) The prosthesis had an estimated survival probability of 94.1% at 13 years. There wasone case of deep infection and one case of meniscal component failure.Clinical evaluation and knee function : The mean Knee score and function score at final followupare 90.0±8.3 and 61.8±29.6. The mean postoperative range of motion at final follow-up wasfrom 0.7° (range 0–20°) to 117.8° (range 90–135°).Radiological analysis : The mean post operative FTA, αangle, βangle, δangle are 173.8±3.9°,96.4±2.2°, 90.9±3.1°, 81.3±2.9°. Clear zone was recognized in 2 tibia components but noprogression was confirmed in the follow-up duration.(Discussion) RTK is mobile bearing total knee which has a one piece meniscal component thatis able to glide antero-posteriorly and rotate on the tibial component. Area contact betweenmeniscal component and femoral component can be maintained from 0°to 90°of flexion. RTKgives satisfactory long-term clinical results. No knees were revised for aseptic loosening. Thismay be a result of the implant design.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]