Investigation of mandibular second molar root and canal morphology in a Black South African population using cone-beam computed tomography and two classification systems.

Autor:	Buchanan GD; Department of Odontology, School of Dentistry, Faculty of Health Sciences, University of Pretoria.; Department of Anatomy, School of Medicine, Faculty of Health Sciences, University of Pretoria., Gamieldien MY; Department of Maxillofacial and Oral Surgery, School of Dentistry, Faculty of Health Sciences, University of Pretoria., Fabris-Rotelli I; Department of Statistics, Faculty of Natural and Agricultural Sciences, University of Pretoria., van Schoor A; Department of Anatomy, School of Medicine, Faculty of Health Sciences, University of Pretoria., Uys A; Department of Anatomy, School of Medicine, Faculty of Health Sciences, University of Pretoria.
Jazyk:	angličtina
Zdroj:	Journal of oral science [J Oral Sci] 2023 Oct 01; Vol. 65 (4), pp. 226-231. Date of Electronic Publication: 2023 Aug 03.
DOI:	10.2334/josnusd.23-0123
Abstrakt:	Purpose: To investigate the root and canal morphology of mandibular second molars, including anatomical variations, in a Black South African population using two classification systems. Methods: Cone-beam computed tomography images of 386 teeth were evaluated. The number of roots and canal configurations were categorized using the classifications of Vertucci (with modifications by Sert and Bayirli) and Ahmed et al. (including the modified Melton classification). Relationships between variables were assessed using Fisher's exact test (P < 0.05). Results: Mandibular second molars were predominantly two-rooted (91.7%). The majority of teeth had three canals including Type IV mesial (41.2%) and Type I (75.1%) distal (Ahmed et al. configuration: 2 MDM M 2 D 1 ). Three or more canals were present in almost one-fifth of mesial (n = 72/386, 18.6%) and a small number of distal (n = 21/386, 5.4%) roots. Males displayed additional canals more frequently in the distal root (P = 0.02). C-shaped anatomy was found in 5.7%. Among the C-shapes, the most common was Melton's Type III in the coronal (50%), middle (81%) and apical (72%) thirds. Conclusion: In this population, mandibular second molar teeth exhibited diverse morphology, which would have clinical significance for endodontic practitioners. The Ahmed et al. classification provided a better description than the Vertucci classification.
Databáze:	MEDLINE
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