Four-rooted permanent maxillary first and second molars in a northwestern Chinese population

Archives of Oral Biology
Yong-chun GuLongxing Ni

Abstract

To detect the incidence and anatomic features of 4-rooted permanent maxillary molars in a northwestern Chinese population by using cone-beam computed tomography (CBCT). A total of 725 Chinese patients with well-developed maxillary permanent first and/or second molars were examined by using CBCT. The number of roots and canals, shape, location, and division level of the roots were evaluated. Four-rooted maxillary first and second molars were classified according to modified Versiani's classification. The root length and cross-sectional diameters of 4-rooted molars were measured by the software Galileos Implant 1.7 (SICAT GmbH & Co. KG, Bonn, Germany). One way analysis of variance followed by a Newman-Keuls post hoc test was used to compare the groups in relation to the root length and diameters (P = 0.05). Among 1365 maxillary first molars, only one tooth had four separated roots, whereas in second molars, 12 out of 1226 teeth (0.98%) exhibited an extra root; the incidences were 1.28% (7/549) for males and 0.74% (5/677) for females. All 4-rooted molars observed were unilateral. Out of a total of thirteen 4-rooted maxillary molars, six exhibited the type I root form, four exhibited the type II root form and one exhibited the type...Continue Reading

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Citations

Mar 25, 2016·Archives of Oral Biology·Hong-Il YooSun-Hun Kim
Oct 20, 2018·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Alexander SchryversPaul Lambrechts
Jul 3, 2019·Case Reports in Dentistry·Gabriel Magnucki
Nov 17, 2016·Restorative Dentistry & Endodontics·Gurudutt NayakInderpreet Singh
Feb 6, 2021·International Journal of Dentistry·Gabriel Magnucki, Sven V K Mietling
Dec 15, 2020·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Hakan Aydın

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