Influence of working length and anatomical complexities on the apical root canal filling: a nano-CT study

Autor(es)

Natalia Siqueira Lobo ^[1] ; Reinhilde Jacobs ; Karla de Faria Vasconcelos ^[3] ; Victor Aquino Wanderley ^[4] ; Bernardo Camargo dos Santos ^[5] ; Marina Angélica Marciano ^[6] ; Alexandre Augusto Zaia ^[7]

Afiliação do(s) autor(es)

^[1] State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Endodontic Division - Brasil

^[3] University of Leuven and Oral & Maxillofacial Surgery. Faculty of Medicine. OMFS IMPATH research group, Department of Imaging and Pathology - Bélgica

^[4] State University of Campinas. Piracicaba Dental School. Department of Oral Diagnosis, Division of Oral Radiology - Brasil

^[5] Federal University of Rio de Janeiro. Department of Nuclear Engineering - Brasil

^[6] State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Endodontic Division - Brasil

^[7] State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Endodontic Division - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Dental Journal; v. 33, n. 3, p. 1-7, 2022-06-24.

Resumo

Abstract The present study aimed to compare the filled volume by gutta-percha and sealer in the apical region of the main canal and ramifications, after instrumentation at two different working lengths using nano-computed tomography (nano-CT). Twenty-two premolars with apical ramifications were selected after micro-computed tomography evaluation and were randomly divided into groups for further endodontic instrumentation at two different working lengths: G1 - Root canals shaped 1 mm short of the apical foramen (n=11), and G2 - Root canals shaped at the apical foramen (n=11). After completing root treatment, nano-CT images were acquired, and the filled volume by gutta-percha and sealer in the main canal apical 0-4 mm and 0-1 mm ranges, and apical ramifications were objectively measured by an operator specialized in both radiology and endodontics, blinded for both groups. The Mann-Whitney test was applied to compare both groups regarding the filling of the main canal apical ranges and apical ramifications with a significance level of 5% (α ≤ 0.05). It was observed that root canals shaped at the apical foramen had a larger volume of the main canal filled than root canals shaped 1 mm short of the apical foramen, at both apical ranges (0-4 and 0-1 mm) (p<0.05). Regarding the filling of the apical ramifications, there was no significant difference between groups (p>0.05). In conclusion, the root canals shaped at apical foramen exhibited increased filling volume of the main canal in the apical region. However, neither of both working lengths influenced filling of the apical ramifications. (AU)

• Processo FAPESP: 17/05391-9 - Avaliação da incidência de ramificações nos 3 mm apicais da raiz dentária por meio de radiografia periapical digital, TCFC e microtomografia computadorizada
• Beneficiário: Natália Siqueira Lobo
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 18/25051-0 - Preenchimento das ramificações apicais localizadas no último mm da raiz dentária utilizando dois comprimentos de trabalho: uma análise por meio da nanoCT
• Beneficiário: Natália Siqueira Lobo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado