Análisis de los cambios producidos en el espesor y altura del cuerpo mandibular después de la utilización de aparatología Herbst y Advansync en pacientes Clase II esqueletal por medio de Tomografía Computarizada de Haz Cónico (CBCT

Abstract

The computed tomography and the generation of three-dimensional images has allowed to improve the quantitative and qualitative assessment of bone changes generated at the mandibular region when using certain appliances, the aim of the present work was to compare the effectiveness of the use of Herbst and Advansync in promoting changes in the thickness and height of the mandibular body in skeletal class II patients using cone beam computed tomography. The research was developed with 29 subjects, who were randomly divided into two groups: "Advansync" and "Herbst". Two CBCT records pre-treatment and post-treatment with a 10-month interval were taken, of each record a three-dimensional image was generated in which the different measurements were made. In addition the jaw segmentation, superposition and fusion were performed for the qualitative evaluation of bone changes. The normality test for small Shapiro Willk samples was performed, which showed a normal behavior in the before and after (p> 0.05), T Student test was applied for related samples, and in the registered differences varied behaviors resulted, therefore, the T-Student test was executed for independent samples in those measures with normal behavior (p> 0.05) and the U-Mann Whitney test for those that had non-normal behavior. (p <0.05). In general there is no significant difference in the number of success cases between both groups, although the group with Advansync had better results