Correlation between cervical vertebrae maturation and midpalatal suture fusion in patients aged between 10 and 20 years: A cross-sectional and 3D study.

OBJECTIVE: This study aimed to correlate the cervical vertebrae maturation (CVM) stages with the bone fusion stages of the midpalatal suture (MPS). MATERIALS AND METHODS: The sample consisted of 351 cone-beam computed tomographies (CBCTs) of patients divided into two groups: 10-15 years old and 16-20 years old. Both CVM and MPS stages were correlated using Spearman's correlation analysis. To assess the diagnostic performance of the CVM stages in identifying the bone fusion stages of the MPS, the likelihood ratio (LHR) test was applied. RESULTS: In the whole sample, a low positive correlation was found between CVM and MPS bone fusion level (P<0.001; Rho=0.395). In the younger age group, the correlation was moderate in the male (P<0.001; Rho=0.616) and low in the female (P<0.001; Rho=0.394) patients. In the 16-20 years age group, there was no correlation between CVM and MPS fusion. A moderate increase in the probability of determining CS1 for stage A (38%) and CS2 for stage B (42.2%) of MPS ossification was found among the 10-15 year old female patients. CONCLUSION: A low and moderate positive correlation was found between CVM and MPS level of bone fusion in female and male patients respectively, but the diagnostic performance of the CVM stages in the identification of MPS bone fusion stages did not have a high correlation. Therefore, the CVM stages indicated no conclusive probability of determining the MPS bone fusion stage.

Evaluation of the suture ossification level according to age and sex in children, adolescents, and adults. A cross-sectional and observational 3D study.

OBJECTIVE: To determine the ossification level of the midpalatal suture (MPS) in children, adolescents and adults from a Peruvian sample; according to the method proposed by Angelieri et al. with cone-beam computed tomographies (CBCTs). MATERIAL AND METHODS: The sample consisted of 315 CBCTs of 168 females and 147 males. The total sample was divided into 3 groups according to age and sex: children (n=77), adolescents (n=113) and adults (n=125). The images were mainly assessed in the axial plane using the Real Scan 2.0 software. The different periods of ossification of the MPS at the level of the vertical half of the palate was defined according to the five stages of Angieleri method (from A to E). The Student t-Test, Chi-square test, Kruskal-Wallis test and Spearman's Rho test were applied. RESULTS: Chi2 test results showed that the stages of MPS ossification depended on the age of the patient by age ranges (P<0.005). Multiple comparison tests affirmed that male and female subjects in the children group had fewer ossification stages than the adolescent and adult groups (P<0.001). Meanwhile, there were no statistically significant differences between the two older age groups. Finally, there was a moderate positive correlation between the stages of ossification of the MPS and the age in the male group (Rho=0.511). CONCLUSIONS: The onset of MPS ossification was significantly related to subjects up to 12 years of age and more frequently in stages B and C in both sexes. There was no difference in MPS ossification in adolescents and adult subjects.

Evaluación de la discrepancia cefalométrica según Steiner, Tweed e Interlandi en pacientes con relación esquelética clase I / Evaluation of cephalometric discrepancy according to Steiner, Tweed and Interlandi in patient with class I skeletal relationship

Objetivo. El objetivo de este estudio fue comparar las discrepancias cefalométricas de Steiner, Tweed e Interlandi en pacientes con relación esquelética Clase I (según proyección USP). Material y métodos. Se estudiaron los cefalogramas laterales de 100 pacientes. Cada película cefalométrica fue trazada encontrándose la posición inicial y final del incisivo inferior con su correspondiente discrepancia cefalométrica. Los promedios de las discrepancias cefalométricas de los tres grupos fueron comparados en pares usando el Test de Wilcoxon, y para comparar los tres grupos se utilizó el Test de Friedman. Resultados. Se encontró un valor promedio para Steiner de -4,084 mm, para Interlandi de -4,325 mm, presentando ambas mayor variabilidad que Tweed quien obtuvo un promedio de -2,702 mm. Los valores de las discrepancias cefalométricas propuestas por Steiner, Tweed e Interlandi, presentaron diferencias estadísticamente significativas. Conclusiones. Se concluye que la discrepancia cefalométrica propuesta por Tweed propone un menor movimiento retrusivo del incisivo inferior en la planificación del tratamiento, en pacientes con relación esquelética Clase I, discrepando con la mayoría de los estudios reportados anteriormente.

Objetive. The aim of this study was to compare cephalometric discrepancies of Steiner, Tweed and Interlandi in patients with ClassI skeletal relationship (as projection USP), for which we studied the lateral cephalograms of 100 patientsMaterial y métodos. Each lateral headfilm was traced meeting the initial and final position of inferior incisor with its corresponding cephalometric discrepancy. The averages of cephalometric discrepancies of the three groups were compared in pairs using the Wilcoxon test, and to compare the three groups used the Friedman test. Results. We found an average value for Steiner of -4,084mm and for Interlandi of -4,325mm, presenting both greater variability that Tweed with an average of -2,702 mm. Values proposed by Steiner, Tweed and Interlandi cephalometric discrepancies, were statistically significant. Conclusions. Conclude that cephalometric discrepancy proposed by Tweed proposes lower moved retrusive for the inferior incisor in the planning of the treatment, in patients with Class I skeletal relationship, disagreeing with the majority of previously reported studies.