Revista de Métodos de Diagnóstico Médico
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Cephalometric Diagnosis with Cbct: Algorithm of Correlation between Sagittal and Vertical Dimensions

Bricchi Elisabetta, Zoia Alessandro,Bellincioni Francesca, Farronato Giampietro

Purpose: The purpose of this study is to analyze and classify a sample size of CT Cone Beam of 201 patients and to identify the correlation between the various cephalometric dimensions.

Material and methods: A sample of 201 patients was randomly selected from an archive of about 650; these patients underwent CT Cone beam technique performed with I-Cat Classic^®. The CBCT of selected subjects were analyzed according to the three-dimensional cephalometry of the School of Milan with the software Materialise Mimics^®. The results contrast with the samples of populations of Class II Malocclusion reported in the literature (2001, Angle, 1907), in which it is reported that the 2^nd deep-vertibite Classes are the most representative of the normo and openvertibite. Statistical comparison was performed with the unpaired t-tests.

It was therefore decided to study the sample of 61 subjects with 2nd class normovertibite with a mathematical algorithm developed by the School of Milan. This algorithm allows correlation of the sagittal and vertical dimensions, especially designed to adapt to the potential of calculation and cephalometric measurement of the Materialise Mimics^® software.

Results: The results show that by correcting the sagittal dimension, 40 subjects of 61 become deepvertibite, while 21 remain normovertibite, thus obtaining a sample of Class II Malocclusion consistent with data reported in the literature.
 

Conclusion: The various dysmorphic disorders rarely occur in one direction of space, and finding a pure form malocclusion is rare: dentofacial abnormalities often coexist, involving three-dimensional anatomical structures developed in all directions of space.