Radiographic and miìroscopic study of radicular resorption close to chronic apical periodontitis (light microscopy and scanning electron microscopy)

Abstract

The objective of this dissertation, which employed 72 extracted human teeth, carrices of periapical lesion, was the morphological study of the resorptions, trying to relate their microscopic identification With the presence or not of the phenomenon in the X-ray of diagnosis. In a first stage we proceeded to the analysis of the X-ray pictures related to the seventy two samples, then in a second stage we submitted chem to Che analysis in optical microscopy. The third stage of our work comprised the confrontation of the radiographic and microscopic findings of the sampling, observing the aspects that occurred in both analyses or in just one of them. The results of the radiographic analysis showed that 63,88% of the samples did not allow to identify radicular resorption, being included in the monobservable radicular resorption category. The rest of the sampling, 36, 11% allowed to see in the X-ray some form of resorption called ohservable radicular resorption. In the microscopic analysis, 5 of the roots kept complete radicular contour, being included in the category of absent radicular resorption. However, most part of the roots, 94,44%, showed some kind of resorption, being included in the group with present radicular resorption. The present dissertation also showed evidence that the conventional X-ray pictures are not efficient resources for the diagnosis of radicular resorptions at initial stages