Min Chen1, Hao Wang1, Chialing Tsauo1, Dingming Huang1, Xuedong Zhou1, Jinzhi He2, Yuan Gao3. 1. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, 14#, 3rd Section of RenMin South Road, Chengdu, 610041, China. 2. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, 14#, 3rd Section of RenMin South Road, Chengdu, 610041, China. hejinzhi@scu.edu.cn. 3. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, 14#, 3rd Section of RenMin South Road, Chengdu, 610041, China. gaoyuan@scu.edu.cn.
Abstract
OBJECTIVES: The aim of this study was to investigate the root canal morphology and the thickness of crown and root of mandibular incisors in a Chinese subpopulation by micro-computed tomography (micro-CT). METHODS: In total, 208 mandibular incisors were scanned using micro-CT. The anatomical features of the canals (canal configuration, apical constriction, foramen-to-apex distance, accessory canal vertical distribution, and canal geometrical parameters) and the thickness of the crown and root 2/3 were evaluated. RESULTS: Three canal categories, labeled as Single (77.88%), Merged (15.87%), and Separated (6.25%), were summarized. The most frequent constriction type in main foramina was single constriction (42.53%). Wide and narrow diameters in a single main foramen were 0.37 ± 0.14 mm and 0.26 ± 0.07 mm, respectively. The distance from the anatomical foramen to the physiological foramen and the anatomical apex was 0.49 ± 0.20 mm and 0.36 ± 0.28 mm, respectively. During the virtual root-end resection, 97.12% of roots underwent successful resection at the 2-mm level, with the foramina visible on the resection surface. During 2-D cross-sectional analyses, the shape parameters of the root and canal showed significant positive correlation (P < 0.05). The thickest and thinnest walls were the incisal and proximal walls (P < 0.05) of the crown, respectively. The buccal walls were significantly thicker than the lingual walls on the crown (P < 0.05), whereas the lingual walls were thicker on the root 2/3 (P < 0.05). CONCLUSIONS: This study provides detailed information about the root canal morphology and thickness of the crown and root of mandibular incisors in a Chinese population. An understanding of morphology can benefit endodontic treatment. CLINICAL RELEVANCE: Adequate knowledge of the crown, root, and canal morphology, as well as the thickness distribution of the crown and root, is essential for successful root canal therapy and prevention of complications.
OBJECTIVES: The aim of this study was to investigate the root canal morphology and the thickness of crown and root of mandibular incisors in a Chinese subpopulation by micro-computed tomography (micro-CT). METHODS: In total, 208 mandibular incisors were scanned using micro-CT. The anatomical features of the canals (canal configuration, apical constriction, foramen-to-apex distance, accessory canal vertical distribution, and canal geometrical parameters) and the thickness of the crown and root 2/3 were evaluated. RESULTS: Three canal categories, labeled as Single (77.88%), Merged (15.87%), and Separated (6.25%), were summarized. The most frequent constriction type in main foramina was single constriction (42.53%). Wide and narrow diameters in a single main foramen were 0.37 ± 0.14 mm and 0.26 ± 0.07 mm, respectively. The distance from the anatomical foramen to the physiological foramen and the anatomical apex was 0.49 ± 0.20 mm and 0.36 ± 0.28 mm, respectively. During the virtual root-end resection, 97.12% of roots underwent successful resection at the 2-mm level, with the foramina visible on the resection surface. During 2-D cross-sectional analyses, the shape parameters of the root and canal showed significant positive correlation (P < 0.05). The thickest and thinnest walls were the incisal and proximal walls (P < 0.05) of the crown, respectively. The buccal walls were significantly thicker than the lingual walls on the crown (P < 0.05), whereas the lingual walls were thicker on the root 2/3 (P < 0.05). CONCLUSIONS: This study provides detailed information about the root canal morphology and thickness of the crown and root of mandibular incisors in a Chinese population. An understanding of morphology can benefit endodontic treatment. CLINICAL RELEVANCE: Adequate knowledge of the crown, root, and canal morphology, as well as the thickness distribution of the crown and root, is essential for successful root canal therapy and prevention of complications.
Authors: Marcela Milanezi de Almeida; Norberti Bernardineli; Ronald Ordinola-Zapata; Marcelo Haas Villas-Bôas; Pablo Andrés Amoroso-Silva; Christian Giampietro Brandão; Bruno Martini Guimarães; Ivaldo Gomes de Moraes; Marco Antonio Húngaro-Duarte Journal: J Endod Date: 2013-10-15 Impact factor: 4.171
Authors: Thomas Gerhard Wolf; Michael Stiebritz; Nane Boemke; Islam Elsayed; Frank Paqué; Richard J Wierichs; Benjamín Briseño-Marroquín Journal: J Endod Date: 2019-12-27 Impact factor: 4.171
Authors: Thomas Gerhard Wolf; Paul Kim; Guglielmo Campus; Michael Stiebritz; Mark Siegrist; Benjamín Briseño-Marroquín Journal: J Endod Date: 2020-04-15 Impact factor: 4.171