The significance of the angle of anteversion of the femoral neck is widely recognisd in congenital dislocation of. the hip cerebral palsy, Legg-Calve-Perthes disease and in-toeing gait. And many methods. of measuring the anteversion have been described since the earrly work by Drehmann (1905) who determined anteversioa by fluoroscopy. · But there has been no reliable methods of measuring the angle until recently.
The authors studies the comparative accuracy and reproducibilitr by the ose of expsrimental model of femur on computerized tomography, axial technique (Dunn), biplanar method (Ryder-Crane) and fluoroscopic method (Rogers) and reported the results with consideration in clinical utility.
1. The most accurate and reproducible method is computerized tomography, but it has much clinical disadvantages such as uneconomy, limited supply, more time requiring in measuring, and also limited information until the ossification of the femoral head was not occur (below the18 months of age)
2. The next accurate and reproducible method is fiuoroscopic method and this is widely useful except the case of limited motion of hip joint.
3. The Ryder-Crane´s biplanar method is very difficult measuring technique, limited in the situation of contracture, deformity around the hip.
4. The axial technique of Dunn are also useful in and state of hip joint and simple in its procedure.
5. The more applicable clinical selection of measuring the femoral anteversion are the combination of the above two or three methods and comparing it with the opposite hip.
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