CC BY 4.0 · Eur J Dent
DOI: 10.1055/s-0043-1772566
Original Article

Deciduous Molars Complexity Anatomy Reveled by Computed Microtomography

Tais Fernandes Teixeira
1   Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
Alexandre Marques Paes da Silva
1   Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
Thais Machado de Carvalho Coutinho
2   Department of Endodontic Research, Iguaçu University, Nova Iguaçu, Rio de Janeiro
Eduardo Fagury Videira Marceliano
3   Dental Clinic Department, Brazilian Army General Hospital of Belem, Belem, Brazil
Ana Raquel Lopes dos Santos Miranda
4   Department of Dentistry, University Center of Pará, Belém, Brazil
Dennis de Carvalho Ferreira
1   Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
2   Department of Endodontic Research, Iguaçu University, Nova Iguaçu, Rio de Janeiro
2   Department of Endodontic Research, Iguaçu University, Nova Iguaçu, Rio de Janeiro
› Author Affiliations
Funding This study was supported by grants from Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazilian Governmental Institutions.


Objective The aim of this study was to analyze the internal morphology of deciduous molars through the use of computed microtomography in a sample from Rio de Janeiro.

Material and Methods Thirty maxillary and 30 mandibular deciduous molars (n = 60), divided in first and second primary molars, were scanned by computed microtomography. The teeth were evaluated for root number, root canals, Vertucci classification, root curvature, presence of lateral canals, furcation dentin thickness, structure model index (SMI), volume, and canal surface area.

Results The results showed 100% of maxillary molars had three roots and Vertucci type I canal was more prevalent in this group. In the mandibular ones, type IV was more frequent in the mesial root and class I in the distal root and the cavo-interradicular canal occurred in 2 specimens. Dentin thickness in the furcation region measured 1.53 and 1.59 mm in the maxillary and mandibular, respectively. Volume and area parameters varied according to the evaluated canals and SMI demonstrated that all canals had a cylindrical shape.

Conclusion More detailed information about the internal anatomy of the primary molars has been described, which may help strategies in the preparation of these root canals.

Publication History

Article published online:
20 September 2023

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