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

被引:2
作者
Kang, Sumi [1 ,2 ]
Yu, Hui-Wen [3 ]
Shin, Yooseok [1 ,2 ]
Karabucak, Bekir [4 ]
Kim, Sunil [1 ,2 ]
Kim, Euiseong [1 ,2 ]
机构
[1] Yonsei Univ, Coll Dent, Dept Conservat Dent, Microscope Ctr, Seoul, South Korea
[2] Yonsei Univ, Coll Dent, Oral Sci Res Ctr, Seoul, South Korea
[3] Natl Hlth Insurance Ilsan Hosp, Dept Conservat Dent, Goyang, South Korea
[4] Univ Penn, Sch Dent Med, Dept Endodont, Philadelphia, PA 19104 USA
基金
新加坡国家研究基金会;
关键词
CANAL ISTHMUS; MAXILLARY; MORPHOLOGY; POSITION; FRACTURE; OUTCOMES; ANATOMY; TISSUE; SYSTEM;
D O I
10.1038/s41598-020-58364-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 30x magnification to evaluate the incidence and microscopic anatomy of the isthmus. The incidence of an isthmus 3mm 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 <1mm at a distance of 3mm from the apex in both types of roots. In this study, whenever two main canals were located in the MB roots of the maxillary first molars and in the M roots of the mandibular first molars, the likelihood of the presence of an isthmus increased. Therefore, clinicians should be aware of the thinnest dimensions in the distal surface of the MB roots of the maxillary first molars and the M roots of the mandibular first molars during nonsurgical and surgical root canal treatment.
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页数:7
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