“…Histological images were captured using an optical light microscope (Carl Zeiss, Göttingen, Germany), coupled to a digital camera (Axio Cam MRc5, Carl Zeiss, Göttingen, Germany). The radicular pulp of five roots of the right first molar ( Figure 3 ) was evaluated following an adaptation of the method proposed by Massaro, et al 19 (2009). The following histological characteristics were evaluated: presence or absence of inflammatory infiltrate, reduced cellularity, increased fibrosis, pulp hyalinization, pulp nodules, diffuse calcification, necrosis, vascular congestion, hemorrhage, thrombosis, reactional dentin, tubules with nuclei.…”