First permanent molar root canal configurations in a South African sample: a descriptive micro-computed tomographic report

Casper H Jonker; Guy Lambourn; Peet J van der Vyver; Charlotte EG Theye; Federico  Foschi; Ericka N L’Abbé; Anna C Oettlé

doi:10.17159/sadj.v80i05.21365

Authors

Casper H Jonker Faculty of Health, Peninsula Dental School, University of Plymouth Ground Floor, Truro Dental Education Facility, Knowledge Spa, Royal Cornwall Hospital https://orcid.org/0000-0002-9110-5208
Guy Lambourn Faculty of Health, Peninsula Dental School, University of Plymouth Ground, Truro Dental Education Facility, Knowledge Spa, Royal Cornwall Hospital, Truro, TR1 3HD, United Kingdom. https://orcid.org/0000-0002-7120-2545
Peet J van der Vyver Department of Odontology, School of Dentistry, School of Health Sciences, University of Pretoria, Pretoria 0031, South Africa. https://orcid.org/0000-0003-1951-6042
Charlotte EG Theye France. Forensic Anthropology Research Centre, Department of Anatomy, Faculty of Health Sciences, University of Pretoria, South Africa. https://orcid.org/0000-0002-4756-8854
Federico Foschi Eastman Dental Institute, Rockefeller Building, 21 University Street, London, United Kingdom. https://orcid.org/0000-0001-6901-0280
Ericka N L’Abbé Forensic Anthropology Research Centre, Department of Anatomy, Faculty of Health Sciences, University of Pretoria, South Africa. https://orcid.org/0000-0002-6722-8814
Anna C Oettlé Department of Anatomy and Histology, School of Medicine, Sefako Makgatho Health Sciences University, Pretoria, 0204, South Africa. https://orcid.org/0000-0002-9389-057X

DOI:

https://doi.org/10.17159/sadj.v80i05.21365

Keywords:

Accessory canals, first molars, micro-CT, root canal configurations

Abstract

The aim of this paper was to describe root canal configurations using micro-CT in South African first molars.A segmentation process was followed on micro-focus X-ray computed tomography (micro-CT) scans of 101 maxillary and 86 mandibular first molars. Main and accessory root canal anatomy were considered to describe root canal configurations. Intra- and inter-observer reliability was
determined using the unweighted Cohen’s Kappa test. Intra- and inter-rater agreement was 93% for maxillary configurations; 92.9% and 86.2% respectively for mandibular configurations. The most common main canal configurations were: 3MXFM MB1DB1P1 (n = 33/93, 35.5%) and 2MDFM M1-2D1 (n = 8/84, 9.5%) (separate three-rooted maxillary and two-rooted mandibular respectively). The addition of accessory canals resulted in configurations that were mostly individualised with only a few notable similarities. A total of
97 unique configurations were found in maxillary teeth and 85 in mandibular teeth. In the separate three-rooted maxillary molars, the only similarities were 3MXFM MB1(A2) DB1(A1) P1 (n = 4/93, 4.3%) and 3MXFM MB1(A1) DB1(A1) P1 (n = 2/93, 2.2%). In two-rooted mandibular molars, only 2MDFM M1D1 (n = 2/84, 2.4%) was noted. Root canal configurations were found to be diverse and complex.

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First permanent molar root canal configurations in a South African sample: a descriptive micro-computed tomographic report

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