Dentin Thickness of Pulp Chamber Floor in Primary Molars: Evaluation by Cone-Beam Computed Tomography

Mariane  Bovino; Larissa de Souza  Santos; Larissa Lopes Freitas de Albuquerque  Cavalcante; Cacilda Castelo Branco  Lima; Marina de Deus Moura  de Lima; Marcoeli Silva  de Moura; Paulo de Tarso Silva  de Macêdo; Lucia de Fátima Almeida de Deus  Moura

Authors

Mariane Bovino
Larissa de Souza Santos
Larissa Lopes Freitas de Albuquerque Cavalcante
Cacilda Castelo Branco Lima
Marina de Deus Moura de Lima
Marcoeli Silva de Moura
Paulo de Tarso Silva de Macêdo
Lucia de Fátima Almeida de Deus Moura

Keywords:

Dental Pulp Cavity, Dentin, Cone Beam Computed Tomography, Molar, Child

Abstract

Objective: Use cone-beam computed tomography (CBCT) images to evaluate the dentin thickness of the pulp chamber floor in primary molars. Material and Methods: Cross-sectional study, conducted with CBCT images of teeth of children. Primary molars with preserved pulp chamber floor were included. The dentin thickness of the pulp chamber floor in the primary molars was measured linearly in CBCT cross-sections. Data were descriptively analyzed and the Mann-Whitney test was applied (p<0.05). Results: 27 CBCT exams and 123 primary molars of children aged 4 to 13 years were analyzed; the majority was female (52.0%). In maxillary molars, the median dentin thickness was 1.50 (0.6–2.2) mm in the first and 1.65 (0.6–2.3) mm in the second (p=0.049) molars. In mandibular molars, the median was 1.20 (0.3–1.7) mm in the first and 1.60 (1.0–2.2) mm in the second (p<0.001) molars. Children aged 4 to 8 years showed less dentin thickness (p<0.001). Conclusion: The median dentin thickness of the pulp chamber floor in primary molars was 1.50 mm, ranging from 0.3 to 2.3 mm. Less dentin thickness was associated with younger children, teeth in the mandibular arch, and first molars.

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