الفهرس 
introduction and aim of the workOnly 14 pages are availabe for public view
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Abstract
This study was done for evaluation of correction of leg deformities by circular external fixator, with a comparison between the conventional Ilizarov and its new modification Taylor spatial frame (ISF). We discuss the biomechanics of the lower limb, stressing on the mechanical axis of the lower limb in both frontal and sagittal plane and joint orientation of both knee and ankle. Different components of Ilizarov apparatus and Taylor spatial frame were described; also the biomechanics of circular external fixator were discussed. The Ilizarov biologic principles and the law of tension stress were discussed explainin the importance of these principles to obtain good osteogensis during lengthening and correction of deformities. We mentioned different cases of angular deformities, and how to evaluate the cases both clinically and radiologically. For the diagnosis and measurement of angular deformities we used the malalignment and malorientation test in both the frontal, sagittal and oblique plane deformities, which is actually a combined frontal and sagittal biplanar deformities. Preoperative planning, operative technique, postoperative management and complications were discussed for patients treated by Ilizarov external fixator and Taylor spatial frame. This study includes 50 patients with leg deformities, treated by circular external fixator, 30 patients treated by Ilizarov external fixator and 20 patients treated by Taylor spatial frame. In Ilizarov group, the mean age was 36.2 years, the mean preoperative angular deformity was 19.4o and the mean limb length discrepancy was 26.2mm. In Taylor spatial group, the mean age was 37.9 years, the mean preoperative angular deformity was 18.6o and the mean limb length discrepancy was 33.6mm. The results of both groups were scored into: Satisfactory results achieved in 84.6% in Ilizarov group while 87% in Taylor spatial group. The results were discussed in comparison with other published results and we concluded that both Ilizarov external fixator and Taylor spatial frame are valuable tools in management of leg deformities as we can correct the all elements of deformity (either angular, rotational, translational deformity or associated shortening). There is no much difference in final results between Ilizarov and TSF.