Abstract
The growth of the interparietal bone and the frontal bone from 14 to 60 days of age was studied in the midsagittal, or para-median sagittal, plane by a combination of roentgenocephalometry and vital staining. The roentgenocephalometric study dealt with growth changes in length and shape of the bones, changes in shape of the cranial vault and changes in angulation between neighbouring bones. The interparietal bone increased in length only between 30 and 60 days, while the frontal bone increased in length during the whole period, although with decreasing velocity. The two bones also changed in shape with age. The cranial vault became flatter and more angulated with increasing age, obviously due to changes in angulation between the bones of the vault. The lack of growth in length of the interparietal bone between 14 and 30 days as found in the roentgenocephalometric part of the study was explained with the results from the alizarin study, which showed that this bone until 30 days had slight resorption on its posterior end and slight apposition on its anterior end. Furthermore, the results from the alizarin study confirm general principles of growth of bones in the cerebral skull, described in previously published studies. A reconstruction of the growth of the bones in the cranial vault is presented from the results of this study and studies previously mentioned. This reconstruction shows how the original bones are situated in relation to the final ones. The problems of drift of bones and the interaction between movements of bones in relation to their former position and movements in space are discussed.
Published Version
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