[Formation of the skeleton. IX. Growth of a long bone: dynamics of diaphysial growth]

The diaphysis of a growing long bone is composed of three distinct parts: the bone periosteal collar and the two metaphyses. Each of these parts affects a separate radiographic, microradiographic and histologic appearance. By these means, it is possible to follow the growth and the increase of these parts and thus the relations which exist between them: all together they constitute the "dynamics of diaphyseal growth".