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Analyse céphalométrique tridimentionnelle : diagnostic des dysmorphies antéropostérieures et verticales Volume 76, issue 2, Juin 2005

Authors

A tridimensionnal cephalometric analysis method from a scanner acquisition, using C2000 and Cepha 3 DT softwares, allows:

- a perfect knowledge of maxillo-facial architecture : the model of skeletal description is based on eight landmarks related to the neuromatricial axis of facial growth (head of mallei, supraorbital, suborbital and submental points). It has been abundantly described and is now used by all people who are interested in studying human face;

- a perfect location of linear and angular dental positions (center of inertia, tipping and torque of each tooth) refering to dental arches, and location of arches refering to maxillo-facial frame : the authors developed the dentoalveolar level of the analysis, mainly for the orthodontists.

The authors observed antero-posterior and vertical parameters of a sample of 134 patients, then it is possible:

- to compare 3D and conventional 2D parameters and to select the most relevant 3D parameters,

- to criticize some of the most usual conventional cephalometric measures,

- to analyse the correlation matrix. It shows some interesting relationship between anteroposterior, vertical and transversal, skeletal and dento-alveolar parameters but denies others: so, angular positions of incisors depend on skeletal or alveolar anteroposterior dysmorphosis but not really on vertical dysmorphosis.