Topographic Analysis of the Isthmus in Mesiobuccal and Mesial Roots of First Molars in a South Korean Population

• Published in: Scientific reports 2020-01, Vol.10 (1), p.1247-1247, Article 1247
• Main Authors: Kang, Sumi, Yu, Hui-Wen, Shin, Yooseok, Karabucak, Bekir, Kim, Sunil, Kim, Euiseong
• Format: Article
• Language: English
• Subjects: 631/1647/328; 631/61; Adult; Anatomy; Dental Pulp Cavity - anatomy & histology; Dental roots; Dentin; Dentin - anatomy & histology; Female; Histology; Humanities and Social Sciences; Humans; Male; Mandible; Maxilla; Microscopy - methods; Molar - anatomy & histology; Molars; multidisciplinary; Odontometry; Republic of Korea - epidemiology; Root canals; Science; Science (multidisciplinary); Teeth; Tooth Apex - anatomy & histology; Tooth Root - anatomy & histology
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-020-58364-1

The purpose of this study was to evaluate the incidence and microscopic anatomy of the isthmus to provide more precise anatomical information about the mesiobuccal (MB) roots of the maxillary first molars and the mesial (M) roots of the mandibular first molars. Twenty-eight maxillary and 31 mandibular first molars were embedded, sectioned, stained, and observed at 30× magnification to evaluate the incidence and microscopic anatomy of the isthmus. The incidence of an isthmus 3 mm from the apex was 89.3% and 100% in the MB roots of the maxillary first molars and in the M roots of the mandibular first molars, respectively. The mean dentin thickness between the isthmus and the distal root surface was