Deformación del área de corte de las limas endodónticas sometidas a diferentes métodos de precurvatura

Objetive: Evaluate the deformations caused in the cutting edges in the K-file #25 (LK), subjected to pre-beinding of the apcial third using the following methods: finder-bending, cotton-pliers bendin and Flexobend, observed under scanning electron microscopy (SEM). Material and methods: Forty-eight LK#25 were divides into 4 groups (n=12); G1, control; G2, finger-bending; G3, cotton-plier bending, G4, Flexobend. The curvature was standardized in the apical segment of the file at 2 mm of D!. Was constructed a model of acrylic resin that correspond to a canal of 20º of curvature. The files were examined under SEM (260X). Data were analyzed using Fisher´s statistical test with a significance level of 5%. Results: The images showed no alterations in the LK, similar to G3, with no statistical difference. G3 and G4 were statistically different form the other groups (p<0.05). Conclusions: the finger-bending method to curve apical third of LK #25 did not alter the cutting edges, the cotton-pliers bending and Flexobend did alter the cutting edges of the files (AU)

Aproximações do teatro do oprimido com a Psicologia e o Psicodrama

O presente artigo aborda as aproximações do teatro do oprimido na modalidade do arco-íris do desejo, método de terapia e teatro criado por Augusto Boal com a Psicologia, em especial com o psicodrama. O teatro do oprimido é frequentemente comparado e até mesmo confundido com o psicodrama, daí a necessidade de apontarmos algumas semelhanças e diferenças entre os dois métodos, as teorias que inspiraram seus criadores, bem como os objetivos que procuravam alcançar. Procuraremos problematizar o uso das técnicas do arco-íris do desejo considerando a função e a preparação do curinga para aplicá-las, seu manejo, bem como o lugar de autoridade que lhe é conferido. As técnicas boalianas devem ser utilizadas com o devido cuidado, pois é necessário não perder de vista as possíveis consequências que o seu uso indevido pode provocar nos participantes, posto que são técnicas mobilizadoras de fortes conteúdos emocionais.

Future Brazilian teachers imaginaries about physics teaching in adults education

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conceptos actuales en la preparación de la cavidad apical para obturación retrógrada en cirugía perirradicular

The endodontic surgery is indicated in cases of failure and/or impossibility of conventional endodontic treatment. Among the existent modalities in the endodontic surgery, the retrograde filling consists on preparation of apical cavity and filling with a retrofilling material. The technical-scientific progress in Endodontics become possible the use of retrotips activated with ultrasonic for retrocavities preparation with appropriate extension and following the long axis of the root. The aim of the study was to present the current resources in the preparation of the retrograde cavity in endodontic surgery, detaching their advantages in comparison with the use of conventional preparation with burns. A review of the literature will be presented, considering the use of ultrasound and laser for retrograde preparation, seeking the current resources that provide better apical preparation, resulting in better prognostic of the endodontic surgery (AU)