Showing papers by "Daniel Flores published in 2005"

Mecanismo de presentación antigénica en el tejido pulpar

Abstract: Multimicrobial infection of the dental pulp triggers inflammatory responses because bacteria and noxious substances may gain direct access to the pulp via dentinal tubules. In recent years pulp biology research has provided a deeper insight into the basic mechanisms that govern pulpal defense and repair. Dendritic cells (professional-presenting cells) are both sensors and messengers that form an early-warning network in many tissues and they express class II antigens indicating a capacity for presentation of antigen to T helper cells. This cells are located in the odontoblastic layer as well as the central portions of the pulp tissue and play an important role in capturing the antigens, migrating to the lymph nodes, and presenting them to the lymphocytes. However the presence of T cells in normal dental pulp demonstrate that it is equipped with immunocompetent cells essential for the initiation of immunological responses. The dendritic cells can also interact with nerves and vessels in the pulp. Thus, neuroimmunologic responses of the pulp may be the prime defense reaction in the pulp- dentin organ.

Comparación de la microfiltración utilizando dos técnicas de obturación con amalgama en molares temporales. Estudio in vitro

Abstract: The purpose of the study was to evaluate microleakage if the conventional amalgam filling along with two different dentina adhesives available commercially, is more effective than when these adhesives are not used. The design of the study was experimental in vitro. The obtained results show that the adhesive amalgam restoration turned out to be more effective as far as the degree of reduction of the microleakage, when was compared with the conventional amalgam restoration.