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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 4
Document type: Journal article
Source: International Endodontic Journal; v. 50, n. 12, p. 1192-1200, DEC 2017.
Web of Science Citations: 8
Abstract

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)

FAPESP's process: 13/03695-0 - Analysis of the anatomy, shaping and disinfection procedures on roots by microcomputed tomography, rapid prototyping, optical and confocal microscopy study.
Grantee:Ronald Ordinola Zapata
Support Opportunities: Scholarships in Brazil - Post-Doctoral