Root and canal morphology of the maxillary first molar: A micro-computed tomography-focused review of literature with illustrative cases. Part 1: External root morphology. S. Afr. dent. j. [Internet]. 2024 Mar. 6 [cited 2024 Nov. 22];79(01):4-10. Available from: https://journals.assaf.org.za/index.php/sadj/article/view/18152