Morphological evaluation of maxillary second molars with fused roots: a micro-CT study.
Int Endod J
; 50(12): 1192-1200, 2017 Dec.
Article
em En
| MEDLINE
| ID: mdl-28196285
ABSTRACT
AIM:
To evaluate the internal and external morphologies of fused-rooted maxillary second molars by means of micro-computed tomography (micro-CT) analysis.METHODOLOGY:
A 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 19.6 µm 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 3 mm from the anatomical apex of the fused roots.RESULTS:
The 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.CONCLUSIONS:
The 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.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Raiz Dentária
/
Dente Molar
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Int Endod J
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Brasil