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. 2022 Sep 19;47(4):e37.
doi: 10.5395/rde.2022.47.e37. eCollection 2022 Nov.

Apical periodontitis in mesiobuccal roots of maxillary molars: influence of anatomy and quality of root canal treatment, a CBCT study

Samantha Jannone Carrion  1 , Marcelo Santos Coelho  1 , Adriana de Jesus Soares  1 , Marcos Frozoni  1
Affiliations

Apical periodontitis in mesiobuccal roots of maxillary molars: influence of anatomy and quality of root canal treatment, a CBCT study

Samantha Jannone Carrion et al. Restor Dent Endod. .

Abstract

Objectives: This study aimed to evaluate the prevalence of apical periodontitis (AP) in the mesiobuccal roots of root canal-treated maxillary molars.

Materials and methods: One thousand cone-beam computed tomography images of the teeth were examined by 2 dental specialists in oral radiology and endodontics. The internal anatomy of the roots, Vertucci's classification, quality of root canal treatment, and presence of missed canals were evaluated; additionally, the correlation between these variables and AP was ascertained.

Results: A total of 1,000 roots (692 first molars and 308 second molars) encompassing 1,549 canals were assessed, and the quality of the root canal filling in the majority (56.9%) of the canals was satisfactory. AP was observed in 54.4% of the teeth. A mesiolingual canal in the mesiobuccal root (MB2 canal) was observed in 54.9% of the images, and the majority (83.5%) of these canals were not filled. Significant associations were observed between the presence of an MB2 canal and the quality of the root canal filling and the presence of AP.

Conclusions: AP was detected in more than half of the images. The MB2 canals were frequently missed or poorly filled.

Keywords: Apical periodontitis; Cone-beam computed tomography; Mesiolingual canal; Root canal anatomy.

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Conflict of interest statement

Conflict of Interest: No potential conflict of interest relevant to this article was reported.

Figures

Figure 1
Figure 1. Representative images showing (A) satisfactory filling, (B) satisfactory filling (MB), unsatisfactory (MB2) and (C) Untreated (MB2).
MB, mesiobuccal; MB2, second mesiobuccal; P, palatal.
See this image and copyright information in PMC

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