Micro-CT evaluation of C-shaped mandibular first premolars in a Brazilian subpopulation

Autor(es)

Ordinola-Zapata, R. ^[1] ; Monteiro Bramante, C. ^[1] ; Gagliardi Minotti, P. ^[1] ; Cavalini Cavenago, B. ^[1] ; Gutmann, J. L. ^[2] ; Moldauer, B. I. ^[3] ; Versiani, M. A. ^[4] ; Hungaro Duarte, M. A. ^[1]

Afiliação do(s) autor(es)

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

^[2] Texas A&M Univ Syst Hlth Sci Ctr, Dept Endodont, Baylor Coll Dent, Dallas, TX - USA

^[3] Larkin Community Hosp, Adv Educ Gen Dent Program, Miami, FL - USA

^[4] Univ Sao Paulo, Dept Endodont, Ribeirao Preto Dent Sch, BR-14049 Ribeirao Preto - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Endodontic Journal; v. 48, n. 8, p. 807-813, AUG 2015.
• Citações Web of Science: 13

Resumo

AimTo describe morphometric aspects of the internal anatomy of C-shaped mandibular premolars from a Brazilian subpopulation using micro-CT analysis. MethodologyFirst mandibular premolars with radicular grooves (n=123) were scanned using a micro-computed tomography system. After cross-section analysis, 83 specimens were identified with a C-shaped canal and selected for micro-CT analysis. Number and location of canals according to Vertucci's classification, distances between anatomic landmarks, occurrence of apical deltas, furcation canals, prevalence of C-shaped cross-sections at five levels as well as 2-dimensional analysis (Area, perimeter, roundness, aspect ratio, major and minor diameters) were performed for the more prevalent anatomical features. Data were compared statistically using Kruskal-Wallis tests (=0.05). ResultsThe more prevalent anatomical types according to Vertucci's classification were Type I (13%), III (8%), V (37%) and VII (2%). Mean distances from the furcation to the cemento-enamel junction were in the range of 5.36-5.65mm. Apical deltas and furcation canals were present in 36 (43%) and 27 (33%) specimens, respectively. C-shaped cross-sections were more prevalent at the middle (56%) and apical middle levels (81%). Overall, significant differences were found in the 2-dimensional analyses between single canals at the apical third and buccal and lingual canals of Vertucci's V classification (P<0.05). ConclusionsIn this Brazilian subpopulation, C-shaped canal configuration of the root canal system was found in 67% of extracted first mandibular premolars with radicular grooves. Vertucci's types I and V were the most prevalent anatomical variations. C-shaped cross-sections were more prevalent in the middle third, and the presence of apical deltas was the most common feature in the apical third. (AU)

• Processo FAPESP: 13/03695-0 - Avaliação da anatomia, protocolos de instrumentação e de descontaminação de raízes por meio de microtomografia, prototipagem de alta resolução, microscopia óptica e confocal.
• Beneficiário: Ronald Ordinola Zapata
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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