O MÚLTIPLO E O DIVERSO EM "VÍCIOS E VIRTUDES"

The Helder Macedo's narrative presents us the writer who meets a friend, also writer, and listens from him the story of his loves. The text inside the text leads us, in a spiral movement, from the author to the character, from the present to the past, from the contingent to the history. The present work aims to reflect on the games of masks formulated by Macedo from the overlapping of registers and narrative plans that is presented in his novel.A narrativa de Helder Macedo conta-nos do escritor que encontra o amigo, também escritor, e ouve desse a história de seus amores. O texto dentro do texto vai nos levando, em espiral, do autor à personagem, do presente ao passado, do contingente ao  histórico.  Este  trabalho  pretende  refletir  sobre  os  jogos  de  máscaras  e  fingimentos formulados por Macedo a partir da sobreposição de registros e de planos narrativos que este seu livro apresenta

Evaluation of Osteoconduction of Biphasic Calcium Phosphate Ceramic in the Calvaria of Rats: Microscopic and Histometric Analysis

(1) Background: Evaluate the osteoconduction capability of a biphasic calcium phosphate (BCP) ceramic composed of hydroxyapatite and β-tricalcium phosphate 60%/40% in a rat model. (2) Methods: In the calvarial bone of 54 adult male rats, 7-mm diameter critical size defects were performed. The animals were randomly allocated to three experimental groups according to the type of material: blood clot (BCG), blood clot covered with a bovine-derived collagen membrane (MBCG), and BCP ceramic covered with a bovine-derived collagen membrane (BCPG). In each group, 6 animals were euthanatized at post-operative days 7, 30, and 60 for histological and histometric analysis. (3) Results: The qualitative analysis revealed the persistence of the collagen membrane at seven days, with no relevant newly bone formation in all groups. At 30 days, centripetal bone formation was observed residual particles of the biomaterial surrounded by fibroblasts noted in the BCPG. At 60 days, while BCG and MBCG showed a partial maturation with the central part of the defect populated by a fibrous connective tissue, in the BCPG the critical area was entirely occupied by newly formed bone. In the intra groups analysis was noted a significant increase in new bone formation during the experimental period (p < 0.05). At 60 days, BCPG showed a higher percentage area of new bone formation (p < 0.05). (4) Conclusion: BCP promoted a new bone formation by osteoconduction and might be considered a valid alternative in bone regeneration procedures