Influence of Working Length and Anatomical Complexities on the Apical Root Canal Filling: a Nano-CT Study

Overview

Journal Braz Dent J

Specialty Dentistry

Date 2022 Jun 29

PMID 35766712

Authors

Natalia Siqueira Lobo

Reinhilde Jacobs

Karla de Faria Vasconcelos

Victor Aquino Wanderley

Bernardo Camargo Dos Santos

Marina Angelica Marciano

Alexandre Augusto Zaia

Affiliations

Soon will be listed here.

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.

Citing Articles

Assessment of the root filling volume in C-shaped root canal on cone-beam CT and micro-CT in relation to nano-CT.

Candemil A, Mazzi-Chaves J, Oliveira M, Ambrosano G, Vasconcelos K, Pauwels R Clin Oral Investig. 2023; 27(11):6413-6420.

PMID: 37704914 DOI: 10.1007/s00784-023-05244-3.

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