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KMID : 0372919980190040341
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Journal of Biomedical Engineering Research
1998 Volume.19 No. 4 p.341 ~ p.350
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The Measurement of Femoral Neck Anteversion by 3D Modeling of Femoral Major Axes
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Kim June-Sic
Kim Sun-Il
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Abstract
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The accurate measurement of the femoral anteversion is important for the derotational osteotomy. To estimate femoral anteversion, following three major parameters are required; the neck axis, the long axis, and the knee axis. Conventional methods on the basis of 2D images are ambiguous to determine these major axes. As the femur has a complex 3 dimensional structure, the 3 dimensional model should be applied for accurate and reliable measurement of femoral anteversion. In this thesis, we model femur and define three parameters. The neck axis is defined from the femoral head and neck model. The long axis is determined from the cylindrical model of the femoral shaft. The knee axis is also determined from the model of femoral condyles. According to the definition of the femoral anteversion, the femoral anteversion is efficiently estimated from these models. 20 specimens were tested by the conventional 2D imaging method and 3D imaging method witch was developed by authors and the new 3D modeling method. The study provides accurate, fast and human factor free measurement for femoral anteversion.
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KEYWORD
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Femoral Anteversion, 3D Measurement, Modeling
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