The research aims to verify the concordance between the skeletal maturity index (SMI) measured on the hand and wrist X-rays using Fishman method and the cervical vertebral maturation stage (CVMS), measured on the lateral cephalometric X-rays using Baccetti method. The concordance of the two indexes (SMI and CVMS) has been statistically verified with the help of the Cohen’s kappa coefficient, by relating them to the growth stages, within a longitudinal study done upon a group of 38 patients, 22 female and 16 male, aged between 8–18 y, the analyzed investigations being done in series, along the orthodontic treatment. The research showed a strong correlation between the SMI and CVMS indexes within the analyzed group, confirmed by the obtained values (k = 0.84 for female and k = 0.85 for male).

In order to verify the concordance of the bone development indices (SMI) estimated on the hand and fist radiograph by the method of Fishman (1982) and the indices of development of the cervical vertebrae (CVMS), estimated on the profile teleradiography by the method of Baccetti (2002), was conducted a cross-sectional study on a group of 150 subjects (89 girls and 61 boys), aged 8-18 years. Based on the existing data in the literature and taking into account the average ages at which the SMI and CVMS stages were reached in the research group, a hypothesis of correspondence between SMI and CVMS stages in the pubertal stages was issued and this hypothesis was statistically verified using the coefficient Cohen k. The obtained results (k = 0.82 for the girls 'group and k = 0.67 for the boys' group) confirm the concordance of the SMI and CVMS indices within the researched group and validate the correspondence hypothesis issued.

This study is intended to focus on the evaluation of posterior vertical mandibular asymmetry by calculating the mandibular asymmetry index on the panoramic radiography in different types of malocclusions, considering the sexual dimorphism in children and adolescent patients and performing a comparative analysis between these groups. In this context, a cross-sectional study was conducted for a group of 214 patients (134 females and 80 males with a mean age of 9.5 ± 2 years). The asymmetry index was calculated for each patient according to the Habets method. The results were analyzed by using the independent Student t-test, ANOVA and Mann–Whitney U-test at the 95% confidence level (p < 0.05). The results of the analyses showed a statistically significant difference between males and females at the level of the condylar index (p = 0.023) and a significant difference in the unilateral posterior crossbite in the Mann–Whitney U test (p = 0.01). No statistically significant differences were found between males and females in the index of the mandibular ramus and condyle-plus-ramus. The highest value of the asymmetry index was recorded at the level of the condyle. We found higher values of asymmetry in Angle Class I malocclusions in all groups and in Class II/1 in the group of females.