Video commentary excerpt
This three-dimensional cephalometric summary is based:
On geometric principles (Cartesian and consistent) describing the craniofacial assembly. For this purpose the structural analysis will consider the "form" of the cranio-facial-dental structures, the architectural will be studied in the trispatiale geometry.
The latter proposes that each structure constituting the craniofacial assembly shall be investigated according to the triad: Position, Orientation, Dimension (POD) - the dimension is understood here as a measure of the size - and this in the three dimensions of the space. There is a very close relationship between the three concepts of the triad and within the observation of an evolution, such as the phenomenon of growth, we consider a fourth dimension: TIME.
For any cephalometric study, four prerequisites are observed:
Taking the plates.
- First avoid magnifications using a remote-distance the object 5 meters away and at an object-plate distance of 15 centimeters. Then use an orientation plan of the head, like the Bouvet plan, in order to better identify the structures x-rayed
- The accuracy of the points used is improved by the three-dimensional teleradiographic editing (this assembly is carried out on the same example, in a video that is entirely dedicated to it)
- The choice of points, lines, plans and reference axis.
- Our analysis will include renowned stable indicators, such as in norma lateralis we adopt the C3 line of Delaire11 and when it is possible, they will be used as indicators like the emergence holes of neurovascular bundles. On the plates in norma frontalis and norma axialis we use the median sagittal plane as a "physiological" axis of symmetry, when embryologically the structures that constitute the fetus are formed, they are welded around it.
- The absence of unwanted movements in the radiographs
For our proposals we try
- To be as "complete" as possible and to summarize what we already know, and to propose new constructions with mandibular diagrams in frontal and axial views.
- To be able to locate exactly, if applicable, the structures responsible for the dysmorphia and / or positional anomalies in place.
- Study the facial becoming by growth forecasts.
- To be able to confirm, if applicable, any etiology that may have lead to the dysmorphia, and draw interest from it for diagnosis.
- Use these interests for therapeutic, orthodontic and / or orthognathic mechanical and / or functional purposes
This method is also valid and to be adapted to new radiographic technologies that we are about to develop (3D in real time)