Ossification of radius

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Figure 1 : Plan of ossification of the radius. From three centers.

Figure 2 : Epiphysial lines of radius in a young adult. Anterior aspect. The line of attachment of the articular capsule of the wrist-joint is in blue.

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The radius is one of the two bones in the forearm.

The radius is ossified from three centers: one for the body, and one for either extremity. That for the body makes its appearance near the center of the bone, during the eighth week of fetal life.

About the end of year, ossification commences in the lower end; and at the fifth year, in the upper end.

The upper epiphysis fuses with the body at the age of seventeen or eighteen years, the lower about the age of twenty.

An additional center sometimes found in the radial tuberosity, appears about the fourteenth or fifteenth year.