Video commentary excerpt
We begin with the clinical examination since the diagnostic test will include the morphological study and positional study of the skeletal bases together by the three-dimensional cephalometric synthesis and finally the differential diagnosis with alveolodental offsets from their respective bases .
The study of face symmetry is done in relation to the PSM in yellow, since embryologically everything revolves around it.
The blue horizontal lines mark the three stages of the face, upper middle and lower;
The parallelism between the frontal line, that of the brows, the bi-pupillaire (red), the sub-nasal, and the under-chin means vertico horizontal symmetry of the skeletal bases.
The parallelism between the bicommissural line and the lines quoted above, can mean the participation or not of the occlusal plane in the skeletal symmetry
Recall that if during the clinical examination:
• A transverse or vertical direction dysmorphosis are suspected, for example skeletal asymmetry or a front tipping of the occlusal plane, a three-dimensional cephalogram is prescribed for the craniofacial morphological and mandibular positional study
• And if any mandibular posture abnormalities are suspected, a scan of the TMJ, mouth closed and mouth open will complement the morphological and positional study of the TMJ components. If a disc dislocation is associated, an MRI is prescribed.