- 期刊
The Rationale of Using Kinetics of Motion Analysis as a Guideline in Treating Adolescent Genu Varum – Report of a Case Before and After Operation
並列摘要
Most of the angular and torsional deformities in children improve gradually until the age of ten with the maturity of joints and the growth of bones. However most of the residual genu varum deformities in adolescents would remain the same and might contribute to the degenerative changes in late adulthood. If the changes are not due to pathological processes, e.g. Blount;s disease, the anatomical mal-alignment from X-ray will not be good enough as a guideline for surgical decision at that age. Kinetic data of motion analysis, especially the peak joint moments, in turn might be of tremendous help. A girl, 14 years old, who suffered from genu varum of right knee was investigated. The mal-alignment of knee was bilateral, while only the wight side was bothersome. Radiographic studies revealed that the anatomical axis of right knee was 6 degree varus as compared to the neutral axis of left knee. Kinetic study of motion analysis revealed that the peak adduction and external rotation moments of right knee were so high that a valgus osteotomy of upper tibia was recommended. After correction, the anatomical axis of right knee changed to 5 degrees valgus and the peak adduction and external rotation moments dropped. We conclude that kinetic study of the joint moments in motion analysis is a reasonable and reliable guideline for surgical decision whenever the anatomical axis is not adequate enough for treatment planning in some circumstances.