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Conclusion: The results of this study will allow manufacturers to make more appropriatedetermination of the sizes of components for total knee arthroplasty in Indian populationhaving smaller anthropometric measurements than Western populations.Key Words: Indian anthropometry, component design, total knee arthroplasty.Friday, October 8, 2010, 11:00-11:50Session B11: Knee MechanicsMeasurements of Knee Kinematics During TKA Surgery Using NavigationSystem Correlate With Postoperative Kinematics*Tokifumi Majima - Hokkaido University, Garduate Schoolof Med. - Sapporo, JapanNaohiro Sawaguchi - - Sapporo, JapanYasuhiko Kasahara - Hokkaido University - Sapporo, JapanTetsuya Tomita - - ,Kazuomi Sugamoto - Osaka University Graduate School of Medicine - Suita, Japan*Email: tkmajima@med.hokudai.ac.jpIt is widely accepted that navigation system for TKA improves precision in componentalignment. Furthermore, some of the system can measure knee kinematics during surgery. Onthe other hand, the measurements of kinematics during surgery have limitations because ofanesthesia and usage of air tourniquet. The purpose of the present study is to compare the kneekinematics during surgery using navigation system and that after surgery using 2D/3DRegistration Technique. Our final goal of the study is to improve clinical outcome byperforming feedback of good clinical results to operating theater by means of kinematicanalysis.Kinematics of ten TKA knees for female (average age 71 years old) medial compartmentalosteoarthritic knees concerning axial rotation and anterior-posterior translation were measuredtwice, the time during surgery and 4 weeks after surgery. During surgery, measurement wasperformed using CT based navigation system (Vector Vision 1.6, Brain LAB, Heimstetten,Germany). Four weeks after surgery, knee kinematics was measured again using a 2-dimensional to 3-dimensional registration technique, which used computer-assisted designmodels to reproduce the position of metallic implants from single-view fluoroscopic images.Surgery was performed by single surgeon using subvastus approach to eliminate the influenceof approach to muscle balance. Implant using the present study was P.F.C. Sigma RP-F (DePuy,Warsaw, USA).Axial rotation in navigation and 2D/3D are 12.3+/-2.3, and 12.6+/-3.8, respectively. Axialrotations in both of the measurement have the same pattern. A-P translations also have the samepattern between measurement in navigation and that in 2D/3D technique. These resultssuggested that intraoperative kinematic measurement links to postoperative kinematics. Studiesof correlations between kinematics and good clinical results are ongoing.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]