[Studies on the shapes of condyles of femur (author's transl)].
Evaluation of 100 sagittal sections shows that all condyle shapes can be classified into 4 groups according to size, if we allow maximal +/- 1 mm for the distance of all points of an individual outline of condyle from the medial outline representative for a particular size group. Large and small condyles resemble each other and can, therefore, be matched by enlargement or reduction. The same mathematical adaptation function can be appied for medial and lateral condyles. The coordinate systems of the adaptation functions for the medial and lateral condyles are displaced against each other by rotation. The angle of rotation varies between 5 and 20 degrees. The center of rotation for all functions is the center of the largest circle which fits into the dorsal condyle region. For the medium size group, its radius is 19.8 mm. This circle produces best adaptation in the dorsal condyle region for the medial and lateral condyle. All functions are suitable for ventral adaptation of the curves to the condyles; however, proper choice of the system of coordinates is of decisive importance. The measurements support the assumption that, apart from pathological changes in the joint, condyles in different individuals are largely uniform in sagittal curvature, i.e. of similar shape.
D001696:Biomechanical Phenomena; D005269:Femur / Q000033:anatomy & histology*; D006801:Humans; D008433:Mathematics
Untersuchungen zur räumlichen Form der Femurkondylen.