Avaliação quantitativa da presença de remanescentes de hidróxido de cálcio associado a diferentes veículos após a fase de remoção da medicação intracanal

Abstract

The aim of this study was to evaluate the presence of calcium hydroxide residuals, associated to different vehicles, into the cervical, medial and apical radicular thirds, after the medication removal. Forty-five bovine incisors were transversally sectioned 18mm from the apex. The canals were biomechanically prepared and received an intra-canal medication. The samples were distributed in groups (n = 10): G1 Physiological Saline; G2 PA; G3 Polyethylene Glycol; G4 Polyethylene Glycol + Camphorated Paramonochlorophenol; and G5 no medication (n = 5, control). After 7 days, the medication was removed, under the mechanical action of the files associated to the physiological saline irrigation, until the irrigative solution s reflux became transparent. The roots were longitudinally sectioned, where initially, by means of a slot made in the long axis of the root, using a chisel and a hammer, it was possible to divide the root in two halves. At this moment, the proof bodies were photographed and the images digitalized, creating conditions for the calcium hydroxide residuals to be macroscopically quantized using the ImageTool® software. According to the statistic results, all the roots presented remains from the medication within the canals. There were found differences among the cervical, medium and apical thirds, when the current vehicle was the Physiological Saline.