Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/doi/10.1590/1807-2577.01124
Revista de Odontologia da UNESP
Original Article

Analysis of the obliteration of the root canal: an investigation with Micro-CT

Análise da obliteração do canal radicular: uma investigação com Micro-CT

Maria Luiza Zamparoni VICTORINO; Marcelo Augusto SERON; Gabriela SANTIN; Eduardo Inocente JUSSIANI; Avacir Casanova ANDRELLO; Fausto Rodrigo VICTORINO

http://dx.doi.org/10.1590/1807-2577.01124 Rev. odontol. UNESP, vol.53, e20240011, 2024
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Abstract

Introduction: Traumatized teeth may undergo calcific metamorphosis of the pulp, a factor which makes endodontic treatment difficult due to the total or partial obliteration of the root canal.

Objective: To compare the existence of root canal lumen between Cone Beam Computerized Tomography and X-ray Microtomography in human teeth.

Material and method: Ten single-rooted permanent teeth with some degree of obliteration observed in 2D radiographic images were selected. Cone Beam Computerized Tomography was performed, and the tomographic profile of root canal calcification was analyzed. The presence of root canal lumen was observed in the in the cervical, middle and apical thirds, and in the pulpal chamber, using scores from 1 to 5. The teeth were analyzed using X-ray Microtomography, and reconstructions were made using the NRecon software. The Friedman test with a significance level of 5% was used.

Results: Notably, in the cervical region, the evaluators observed a low probability of the existence of lumen in the canal, using Cone Beam Tomography. However, the Micro-CT consistently identified the presence of canal lumen in this region. In the middle and apical regions, the probability of the existence of root canal lumen was confirmed among the evaluators at 100%, using Microtomography. A pattern of root canal obliteration from the crown to the apex was also observed in all specimens, and the canal lumen was confirmed using Microtomography images.

Conclusion: It was evident that, for the endodontic treatment of cases with canals barely visible in the tomography, the probability of their existence is high.

Keywords

Endodontics; cone beam spiral computerized tomography; pathology

Resumo

Introdução: Dentes traumatizados podem sofrer com metamorfose cálcica da polpa, fator que dificulta o tratamento endodôntico devido à obliteração total ou parcial do canal radicular.

Objetivo: Comparar a existência de luz do canal radicular entre a Tomografia Computadorizada Cone Beam e a Microtomografia de Raios-X em dentes humanos.

Material e método: Foram selecionados dez dentes permanentes unirradiculares com algum grau de obliteração observada em imagem radiográfica 2D. Foi realizada a Tomografia Computadorizada de Feixe Cônico, e analisado o perfil tomográfico da calcificação dos canais radiculares. A presença da luz do canal radicular foi observada nos terços cervical, médio, apical e na câmara pulpar, utilizando escores de 1 a 5. Os dentes foram analisados usando Microtomografia de Raios-X e reconstruções foram feitas com o software NRecon. O teste de Friedman foi utilizado com significância de 5%.

Resultado: Notavelmente, na região cervical, foi observada pelos avaliadores uma baixa probabilidade de existência do lúmen do canal pela Tomografia Cone Beam. No entanto, a Micro-CT consistentemente identificou a presença de lúmen do canal nessa região. Nas regiões média e apical, a probabilidade de existência do lúmen do canal radicular entre os avaliadores foi confirmada em 100% com a Microtomografia. Foi observado ainda, em todos os espécimes um padrão de obliteração do canal radicular da coroa ao ápice, e o lúmen do canal confirmado com imagens de Microtomografia.

Conclusão: Ficou evidente que, para o tratamento endodôntico de casos com canais pouco visíveis na Tomografia, a probabilidade de sua existência é alta.

Palavras-chave

Endodontia; tomografia computadorizada de feixe cônico espiral; patologia

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Submitted date:
06/04/2024

Accepted date:
11/03/2024

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