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Published in French in Tropical Dental Journal Volume 22 - September 1999 pages 5-11
Article Open access
Authors : P. KOUAME, M.M. ROUSSET. AMANTHI D., J.P.DUBUS - France
Depuis 1925 avec les travaux de BROADBENT et l'invention du céphalostat, la céphalométrie téléradiographique a permis la connaissance des structures crânio-maxillo-faciales, d'apprécier la croissance maxillo-faciale et d'analyser les rapports architecturaux entre les diverses pièces osseuses. Cependant elle a fait l'objet de nombreuses critiques du fait des effets de grandissements et de distorsions mis en évidence par de nombreux auteurs (VION DAHAN, VILLAIN...).
La question des grandeurs réelles reste encore d'actualité, même si certains auteurs ont proposé des solutions qui semblent par ailleurs, occulter l'effet de la projection radiographique conique. La présente étude, tout en mettant le rayonnement X en équation, apprécie non seulement l'effet de grandissement et de distorsion mais aussi et surtout l'effet de la projection radiographique conique et propose une méthode de correction en 3D des positions des points anatomiques radiographiés.
Since 1925, the work of BROADBENT and the invention of the cephalostat (in 5), radiographic cephalometry has enabled us to have a detailed knowledge of craniofacial structures, and to better understand the form of the skull. At the same time it enabled us to understand the maxillo-facial growth and dental maturation. However, they have given rise to many controversies because of magnifying power and distortions.
The question posed by magnification is still debated, even if some authors have attempted to solve the problems brought forward by distortion effect which seem to neglect radiographic conical projection. This study aims to appreciate not only the magnifying and its distortion consequences but equally the effect of comical X ray. The authors make use of mathematical equations and attempt to bring forward a correction based on 3D projection.
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