Morphologic Micro-Computed Tomography Analysis of Mandibular Premolars with Three Root Canals

Autor(es)

Ordinola-Zapata, Ronald ^[1] ; Bramante, Clovis Monteiro ^[1] ; Villas-Boas, Marcelo Haas ^[1] ; Cavenago, Bruno Cavalini ^[1] ; Duarte, Marco Hungaro ^[1] ; Versiani, Marco Aurelio ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Endodont, Bauru Dent Sch, BR-17012901 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Dept Endodont, Ribeirao Preto Dent Sch, BR-17012901 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENDODONTICS; v. 39, n. 9, p. 1130-1135, SEP 2013.
• Citações Web of Science: 15

Resumo

Introduction: This study aimed to describe the anatomy of mandibular premolars with type IX canal configuration by using micro computed tomography. Methods: Mandibular premolars with radicular grooves (n = 105) were scanned, and 16 teeth with type IX configuration were selected. Number and location of canals, distances between anatomic landmarks, occurrence of apical delta, root canal fusion, and furcation canals, as well as 2-dimensional (area, perimeter, roundness, major and minor diameters) and 3-dimensional (volume, surface area, and structure model index) analysis were performed. Data were statistically compared by using analysis of variance and Kruskal-Wallis tests (alpha = 0.05). Results: Overall, specimens had 1 root with a main canal that divided into mesiobuccal, distobuccal, and lingual canals at the furcation level. Mean length of the teeth was 22.9 +/- 2.06 mm, and the configuration of the pulp chamber was mostly triangle-shaped. Mean distances from the furcation to the apex and cementoenamel junction were 9.14 +/- 2.07 and 5.59 +/- 2.19 mm, respectively. Apical delta, root canal fusion, and furcation canals were present in 4, 5, and 10 specimens, respectively. No statistical differences were found in the 2-dimensional and 3-dimensional analyses between root canals (P > .05). Conclusions: Type IX configuration of the root canal system was found in 16 of 105 mandibular premolars with radicular grooves. Most of the specimens had a triangle-shaped pulp chamber. Within this anatomic configuration, complexities of the root canal systems such as the presence of furcation canals, fusion of canals, oval-shaped canals in the apical third, small orifices at the pulp chamber level, and apical delta were also observed. (AU)

• Processo FAPESP: 09/09989-0 - Avaliação de diferentes técnicas de preparo biomecânico, obturação, retrobturação, preparo para contenção intraradicular e qualidade do trabeculado ósseo apical de dentes submetidos a diferentes tratamentos, por meio de microtomografia computadorizada
• Beneficiário: Manoel Damiao de Sousa Neto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/16072-2 - Microtomógrafo (MicroTC) no estudo da anatomia dental e nos procedimentos endodônticos
• Beneficiário: Clovis Monteiro Bramante
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/16002-4 - Efeito das soluções químicas e dos meios físicos utilizados na irrigação endodôntica na dentina infectada por biofilmes orais
• Beneficiário: Ronald Ordinola Zapata
• Modalidade de apoio: Bolsas no Brasil - Doutorado