Tratamiento de conductos radiculares en lesiones endo-periodontales / No disponible

La Periodoncia y la Endodoncia tienen en común factores etiológicos y fisiopatológicos, las dos presentan etiología de origen bacteriano y su evolución afecta a los tejidos de soporte de los dientes en la zona apical (endodonto) y en la zona marginal (periodonto). Las lesiones que afectan conjuntamente a la zona apical y a la zona marginal son llamadas lesiones endoperiodontales e incluyen la interacción de la enfermedad pulpar y periodontal. El objetivo primordial de la terapia reconstructiva de los dientes tratados endodóncicamente es crear un cierre marginal que bloquee la entrada y la proliferación de bacterias en el sistema de los túbulos dentinarios, impidiendo la reinfección del tratamiento endodóncico (AU)

Periodontics and endodontics have the same etiologic and physiologic factors; both things have a bacterial etiology and their evolution affect the tissue of the apical foramina and marginal zone of teeth. The infection that affect the apical and marginal zone are called endoperiodontal lesion. It´s very important, for the resolution of these lesions, the “restitution ad integrum” of teeth for the creation of a barrier for the entry of bacteria into the dental microtubules system again (AU)

Neural substrata underlying tectal eye movement codification in goldfish.

The optic tectum encodes orienting eye saccades in a spatially ordered map. To investigate whether the functional properties of each tectal site are related to a particular pattern of connectivity with downward structures in the brainstem, two sets of experiments were carried out. First, biotinylated dextran amine (BDA) was injected at different tectal sites along the anteroposterior axis. Electrical stimulation at these sites evoked saccades whose horizontal component amplitudes increased with the distance to the rostral pole. In the second experiment, BDA and fluoro-ruby (FR) were injected at different tectal sites along the mediolateral axis. Electrical stimulation here evoked saccades with different upward and downward directions, but similar horizontal component amplitudes. A major finding of the first experiment was that a topographic link of the tectum exists with the mesencephalic reticular formation, but that such a connection was absent or very attenuated for the rhombencephalic reticular formation. In the second set of experiments, the clusters of BDA and FR boutons left by the mediolateral tectal sites were separated in the rostral mesencephalon, at the level of the nucleus of the medial longitudinal fasciculus, but overlapped in the caudal mesencephalon and rhombencephalon. These data provide evidence that decodification of tectal motor commands is based, at least in part, on the connectivity of each tectal locus on downward structures with the brainstem.