Determinação da espessura cemento-dentina remanescente em zona de perigo de molares inferiores após preparo do canal radicular usando novo software de tomografia computadorizada de feixe cônico

• Autor(a) principal: Sousa, Vinícius Caixeta de
• Data de Publicação: 2020
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/11309
• topic: Zona de perigo; E-Vol DX; Anatomia do canal radicular; Preparo do canal radicular; Tomografia computadorizada de feixe cônico; Cone beam computed tomography; Danger zone; E-Vol DX; Root canal anatomy; Root canal preparation; CIENCIAS DA SAUDE

This study measured the thickness of cementum/dentin in the danger zone of mandibular molars after root canals preparation (RCP) using a novel cone-beam computed tomography (CBCT) software. Material and methods: Eighty-four teeth were distributed into four groups: G1. ProTaper Next; G2. BioRace; G3. Reciproc Blue; G4. WaveOne Gold. CBCT images were acquired before and after RCP. The e-Vol DX® CBCT software was used to measure initial and final remaining cementum-dentin thickness after RCP of the mesial root of mandibular molars at 1 and 3 mm from the furcation. The Kolmogorov Smirnov test, analysis of variance and Student t test were used to statistical analysis. The level of significance was set at 5%. Results: Differences between mean initial and final thicknesses of the mesiobuccal (MB) and mesiolingual (ML) canals were not statistically significant. Lower mean initial thickness at 3 mm (0.900mm ± 0.191) than at 1 mm (1.035mm ± 0.184) indicates that this is the danger zone. Although cementum/dentin is thinner at 3 mm from the furcation (0.715 ± 0.186) after RCP, the greatest amount of dentin removal was found at 1 mm (0.734 ± 0.191). Conclusions: Remaining cementum dentin was thicker than 0.715 mm in root canals prepared using #35 (WaveOne Gold®) and #40 (ProTaper Next®, BioRace® and Reciproc Blue®) instruments, which confirms the safety of canal preparation in the danger zone.