Evaluation of the Loads Applied on the Hip Joints in Walking with and without Scottish Rite Orthosis in Subjects with Perthes Disease A Pilot StudyKarimi, Mohammad Taghi, PhDJPO: Journal of Prosthetics and Orthotics: October 2018 - Volume 30 - Issue 4 - p 242–246 doi: 10.1097/JPO.0000000000000212 ORIGINAL RESEARCH ARTICLES Buy Abstract Author InformationAuthors Article MetricsMetrics Introduction Although the main aims of treatment in Legg-Calvé-Perthes disease are to increase the containment of the femoral head within the acetabulum and to decrease the loads applied to the hip joint, none of the treatment approaches have been successful. There has been no research evaluating the effect of using an orthosis on joint reaction forces in the subjects with Perthes disease. Therefore, the aim of this study was to evaluate the joint reaction forces in the subject with this disease while walking with and without orthosis. Methods Two subjects with Perthes disease participated in this study. They were asked to walk with and without Scottish Rite orthosis. Open SIMM software was used to extract the joint reaction forces in both conditions. The difference between kinetic and kinematic parameters in walking with and without orthosis for each subject was evaluated by two-sample t-test. Results The results of this study showed that the ground reaction force applied on the leg increased. Use of orthosis influenced the kinematics of hip joint and pelvis. Conclusion Since joint reaction force is one of the main parameters influencing hip joint deformation, use of orthosis may not influence the final deformation. As this was a pilot study, it is recommended to do research with a larger number of subjects. MOHAMMAD TAGHI KARIMI, PhD, is affiliated with the Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences; and Bone and Joint Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Disclosure: The authors declare no conflict of interest. Correspondence to: Mohammad Taghi Karimi, PhD, Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran P.O.B: 33669-71947; email: Karimi@rehab.mui.ac.ir © 2018 by the American Academy of Orthotists and Prosthetists.