RESUMEN. Introducción: el crecimiento y el desarrollo craneofacial permiten que algunas alteraciones dentales sean compensadas con respuestas maxilares. El propósito de este estudio consistió en relacionar la discrepancia maxilo-mandibular en sentido transversal con las inclinaciones bucolinguales de los primeros molares permanentes maxilares y mandibulares en una población con edades entre 10 y 16 años, por medio de tomografías computarizadas de haz de cono (CBCT

Objective: To characterize oclussal relationships in primary and early mixed dentition and arch dimensions in sagittal, transversal and vertical planes. Materials and methods: This descriptive study considered a convenience sample of 107 children with an average age of 5.69 years (59 girls and 48 boys) registered in ten schools. Panoramic and cephalometric radiographs and study models were taken according to validated protocols. Panoramic radiographs showed the position and angulation of the first permanent molars. Results: 84% of patients in the study were characterized by having complete dentition, having a left and right molar relationships in flat terminal plane, an increased vertical overbite, an anterior superior width in a range between 27 and 32 mm, a superior posterior width between 32 and 39 mm, an anterior inferior width between 22 and 27 mm and an inferior posterior width between 39 and 46 mm. The inclination angle of the first superior molar is between 25 and 36 degrees. Conclusion: Most patients had arch dimensions and canine and molar relationships within the normal parameters as reported in the literature. Increased overbite and overjet in vertical and horizontal planes were found. In primary dentition, flat terminal plane and Class I canine relationship predominated. Only in 16 patients was applicable permanent molar relationship, of which 9 had class II.

Objective: To determine the characteristics of hand-wrist and cervical vertebral ossification and establish the correlation between these two techniques as indicators of somatic maturation in children between 8 and 17 years old. Materials and Methods: A cross sectional and correlational study was carried out in 200 children between 8 and 17 years old, born in the same city. Children should show no systemic diseases that affect the skeletal development or craniofacial syndromes. Lateral cephalometric radiographs and carpogram test were taken in the same day. The frequency of the variables such as gender, carpal and cervical vertebrae maturation indexes was established. A correlation matrix (Pearson’s coefficient) for the quantitative variables (height and weight) and the variables that explain the indexes, and the ordinal scale variables and Kendall’s Tau-b statistics were done. Regression models were developed to predict the skeletal maturation index (SMI). Results: According to the age and level of skeletal maturation (skeletal maturation assessment - SMA), the ossification stages begin earlier in women than in men (women SMI1: 8.4 +0.8 years and in men to 10.3 +1.5 years). Depending on the correlation model, there is a direct relation between height and shape of vertebrae with the SMI. The coefficient of determination (R2) indicated that 86% of SMI is explained by the two analyzed variables. Conclusions: There was a statistically significant correlation between height and shape of the vertebral body with stages of skeletal maturation index (SMI).

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