Incidence of retromolar foramen in human mandibles: ethnic and clinical aspects

The retromolar foramen allows the passage of the neurovascular bundles that contribute to nutrition and innervation of the pulp and periodontium of the lower teeth. Knowledge of this anatomical variation may prevent complications in the anesthesia and surgical procedures in this area and serve as an anatomical landmark for ethnic identification. The aim of this study was to evaluate the impact of the retromolar foramen in human mandibles of adult Brazilians and discuss the clinical and ethnic related to the presence of this foramen. Were evaluated 222 human mandibles, dry, adults, Brazilians, independent of gender. The evaluation was performed by two examiners who standardized search from a previous anatomical study. The mandibles were analyzed: the presence of the retromolar foramen (bilateral or unilateral), the presence of the foramen on right and left sides, and the number of foramens present on each side. It was found that 59 had at least one mandible retromolar foramens resulting in an incidence of 26.58%. The retromolar foramen was present unilaterally in 41 mandibles and 18 bilaterally, with incidences of 18.47% and 12.16% respectively. on the right side, the retromolar foramen was present in incidences of 16.22% and 18.92% respectively The analysis of the right side of the mandibles revealed that 47.46%, 21.21% and 3.03% had one, two and three foramens, respectively The left side showed 55.93%, 16.22% and 8.11% of the 222 mandibles with one, two and three retromolar foramens, respectively The incidence of retromolar foramen in the Brazilian population is significant and should be considered in the planning and execution of procedures in several areas of clinical practice dentistry in order to avoid complications. Moreover, it was found that the incidence of retromolar foramen contributes to differentiation of ethnic groups in the area of forensic anthropology.

Aquilombamento no Maranhão: um Rio Grande de (im)possibilidades

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Problemática psicosocial y educacional de los niños marginados

The marginalized children’s psychosocial and educational issues, in this essay, are referred to the theoretical debate upon knowledge development and the possible solutions for those children.This issue will be addressed through the analysis of structures or forms of knowledge organization and from the necessary differentiation of social and individual cognitive development. Basedontheseobjectives, we will analyzethe classical theoriesrelated to cognitive developmentofdisadvantaged children, discussindividual andsocialcognitive developmentand, based on our empirical research, postulatean explanationforthese children’s cognitive development. Finally we will discuss and propose some educational solutions.

Contribuições da psicologia histórico-cultural para a educação do campo

Este artículo tiene como objetivo presentar los supuestos básicos de la psicología histórico-cultural con el fin de aclarar sus contribuciones a la educación del campo. Esta teoría psicológica, cuya base filosófica es lo materialismo histórico-dialéctico, afirma el carácter social de la psique humana y la apropiación de signos como estera del desarrollo ilumina el papel indispensable de la educación escolar en la formación de los individuos. En este sentido, aborda los siguientes temas: historia y fundamentos filosóficos-metodológicos de la sicología histórico-cultural; diferenciación entre las propiedades psíquicas heredadas por la naturaleza (funciones síquicas básicas) y aquellas culturalmente formadas (funciones síquicas superiores); expresiones ontogenéticas de la producción y interiorización de la cultura; relaciones de intercondicionabilidad entre prácticas sociales y comportamientos complejos culturalmente formados. Como conclusión señala las alianzas entre la matriz psicológica resaltada y la pedagogía histórico-crítico, ya que para ambas teorías no son cualquiera modelo de educación escolar que apoyan la formación de las personas, sino más bien, una que les ofrece los contenidos culturales históricamente sistematizados y aprobados por la práctica social de todos los hombres.

Wettability behavior of nanotubular TiO2 intended for biomedical applications

Nanotubes have been subject of studies with regard to their ability to promote differentiation of several cells lines. Nanotubes have been used to increase the roughness of the implant surfaces and to improve bone tissue integration on dental implant. In this study TiO2 nanotube layer prepared by anodic oxidation was evaluated. Nanotube formation was carried out using Glycerol-H2O DI(50-50 v/v)+NH4F(0,5 a 1,5% and 10-30V) for 1-3 hours at 37ºC. After nanostructure formation the topography of surface was observed using field-emission-scanning-microscope (FE-SEM). Contact angle was evaluated on the anodized and non-anodized surfaces using a water contact angle goniometer in sessile drop mode with 5 μL drops. In the case of nanotube formation and no treatment surface were presented 39,1° and 75,9°, respectively. The contact angle describing the wettability of the surface is enhanced, more hydrophilic, on the nanotube surfaces, which can be advantageous for enhancing protein adsorption and cell adhesion.