The Sagittal Growth of the Upper Face During Foetal Life

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Abstract
The nasal septum seems to be stable in its angular relationship with the anterior cranial base The Nasal Line NL despite an initial small increase seems to follow the same trend as the anterior cranial base and nasal septum in their angular behaviour to the posterior cranial base. There is an increase in the prognathic development of the upper jaw in relationship to NSL. The correlation analysis tends to show that a posterior rotation of the Nasal Line (NL) and the Septal Line (SL) in relation to the cranial base will lead to a reduction in upper jaw prognathism whereas an anterior rotation of NL and SL to the anterior cranial base will be followed by an increase in upper jaw prognathism. Upper facial prognathism is associated with the length and also with the relative forward position of the upper jaw and nasal septum. Increased upper facial prognathism seems to be associated with a distal basal relationship between the two jaws. There seems to be an anterior shift of the transverse maxillo-palatine suture during foetal life. In all foetal stages the lower septal point (lsp) was found anterior to the anterior nasal spine (ans). The correlation analysis tends to show that the length factor of the upper jaw and its relative forward position contributes equally in the prognathic relationship of the upper face.