RESUMO

Introduction: The aim of this study was to evaluate the canal transportation and centering ability of ProTaper Next (PTN), WaveOne Gold (WOG) and Reciproc Blue (RCB) in simulated curved resin canals. Methods and Materials: A total of 43 blocks of simulated resin canals with 40° of curvature were prepared to an apical size of 0.02. Flexofile #15 instruments were used along the root canal to reach patency. The blocks were randomly assessed and sequence instruments were used according to each system: PTN, RCB and WOG. The imposition of pre and post instrumentation images were composited and analyzed. The canal transportation and apical centralization were measured using the software GIMP (2.8.4, Creative Commons - Share Alike 4.0 International License, 2013). Data were statistically analyzed using the Shapiro-Wilk test, ANOVA test and Tukey's test. The level of significance was set at 0.05. Results: There were no statistical differences in canal transportation between three systems. The general assessment of three systems presented the RCB group with higher values of centralization and more numbers of centralized points with significant differences between the PTN and RCB groups (P<0.05). Conclusion: In this in vitro study, there were no statistical differences in canal transportation between the RCB, WOG and PTN systems. The lowest transportation was observed in the apical region at 3 mm performed with RCB system, followed by WOG and PTN systems. The RCB demonstrated higher values of centralization and more centralized points when assessed by regions.

RESUMO

Os neurofibromas solitários são neoplasias benignas, originadas do tecido nervoso, cuja ocorrência na cavidade oral é rara. Podem apresentar-se como lesões sésseis ou pedunculadas, de consistência fibrosa, podendo ser facilmente confundidos com outras lesões de tecido mole, como os fibromas. No presente artigo os autores relatam um caso clínico de um neurofibroma intraoral solitário na região anterior de mandíbula edêntula. O tratamento realizado foi a biópsia excisional.

Solitary neurofibromas are benign neoplasms originating in nervous tissue and rarely occurring in the oral cavity. They may present as sessile or pedunculated lesions of fibrous consistency, and can be easily confused with other soft tissue lesions such as fibromas. In this article the authors report a case of an intra-oral solitary neurofibroma in the anterior region of an edentulous jaw. The treatment performed was excisional biopsy.