Morphological evaluation of maxillary second molars with fused roots: a micro-CT study

Autor(es)

Ordinola-Zapata, R. ^{[1, 2]} ; Martins, J. N. R. ^[3] ; Bramante, C. M. ^[1] ; Villas-Boas, M. H. ^[1] ; Duarte, M. H. ^[1] ; Versiani, M. A. ^[4]

Afiliação do(s) autor(es)

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

^[2] Albert Einstein Med Ctr, Bender Div Endodont, 5501 Old York Rd, Philadelphia, PA 19141 - USA

^[3] Univ Lisbon, Fac Med Dent, Dept Endodont, Lisbon - Portugal

^[4] Univ Sao Paulo, Ribeirao Preto Dent Sch, Dept Restorat Dent, Ribeirao Preto - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Endodontic Journal; v. 50, n. 12, p. 1192-1200, DEC 2017.
• Citações Web of Science: 8

Resumo

AimTo evaluate the internal and external morphologies of fused-rooted maxillary second molars by means of micro-computed tomography (micro-CT) analysis. MethodologyA total of 100 fused-rooted maxillary second molars from a Brazilian subpopulation were divided into six groups according to the root morphology. The samples were scanned at a resolution of 19.6m and evaluated with regard to the external morphology of the roots, the root canal configuration, the percentage frequency of C-shaped canals and isthmuses, as well as the morphology of the root canal system at 1, 2 and 3mm from the anatomical apex of the fused roots. ResultsThe most prevalent root canal fusions were type 1, mesiobuccal root fused with distobuccal root (32%), followed by type 3, DB root fused with P root (27%), and type 4, MB root fused with DB root, and P root fused with MB or DB roots (21%). The prevalence of C-shaped root canal systems were 22%. Depending on the type of root fusion, the percentage frequency of isthmuses in the apical level varied from 9.3% to 42.8%, whilst the presence of apical deltas ranged from 18.5% to 57.1% of teeth. ConclusionsThe root canal system of maxillary second molars with fused roots may have a high incidence of merging canals, isthmuses, apical deltas and C-shaped configurations. (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