[Growth of the components of the human hip joint.].
The mutual ratio of the extent of cartilaginous surface of the acetabulum and of the femoral head in human fetuses from the second and third month, from fetuses from the 24th week of pregnancy and from human newborns, children and adults was studied. The results of our research are as follows: 1. In small human fetuses is the hip joint an ellipsoid articulation, the head lies deeply in the articular pit, the labrum glenoidale is large. 2. In fetuses from the 3rd quarter of pregnancy is the femoral head relatively big and it is situated only shallowly in the articular cavity, so that an impor tant part of the femoral head has no contact with the corresponding articular pit. 3. In the period of the end of intrauterine life the relations are partly changed because the articular pit becomes deeper. The changes of the growth accelerations and retardations are in the period of the end of intrauterine life not yet finished. 4. We see the explanation of these curious chan ges in the fact, that every component of the articu lation has its own growth speed. 5. All facts described in this communication show that in a newborn the hip joint is not yet prepared for its function. Key words: hip joint, growth.
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Anatomický ústav 1. lékarské fakulty KU, Praha.