Abstract
This study was conducted to evaluate the effect of the various osteotomy parameters on the biomechanical aspects of the hip joint on a computerised model. The data of the radiographs and a three-dimensional (3D) CT scan of six patients with coverage deficient hip joint were used to construct a 3D computer model. Then Chiari type osteotomies were simulated using various heights, angles and fibrocartilage thicknesses. A new angle called the mid acetabular center edge (MACE) angle was defined in a mid coronal CT cut. The optimum displacement for obtaining the maximum coverage averaged 73%. The angle and height of the osteotomy had a significant effect on the MACE angle (P value < 0.01). Our findings of these Chiari parameters may change the results of the osteotomy. The probability of adapting the proximal osteotomy segment to a deformed femoral head was explained by the model and a modified osteotomy “multiple height osteotomy” was proposed.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s00264-009-0919-6
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Karami, M., Gouran Savadkoohi, D., Ghadirpoor, A. et al. A computer model for evaluating the osteotomy parameters of Chiari pelvic osteotomy. International Orthopaedics (SICOT) 34, 329–333 (2010). https://doi.org/10.1007/s00264-009-0769-2
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DOI: https://doi.org/10.1007/s00264-009-0769-2