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Topographic Analysis of the Isthmus in Mesiobuccal and Mesial Roots of First Molars in a South Korean Population.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-27 , DOI: 10.1038/s41598-020-58364-1 Sumi Kang 1 , Hui-Wen Yu 2 , Yooseok Shin 1 , Bekir Karabucak 3 , Sunil Kim 1 , Euiseong Kim 1
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-27 , DOI: 10.1038/s41598-020-58364-1 Sumi Kang 1 , Hui-Wen Yu 2 , Yooseok Shin 1 , Bekir Karabucak 3 , Sunil Kim 1 , Euiseong Kim 1
Affiliation
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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 <1 mm at a distance of 3 mm 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.
中文翻译：
在韩国人口中，第一磨牙近中颊和中根的峡部地形分析。
这项研究的目的是评估峡部的发生率和显微解剖，以提供有关上颌第一磨牙的近颊（MB）根和下颌第一磨牙的近中（M）根的更精确的解剖信息。将28颗上颌磨牙和31颗下颌第一磨牙包埋，切片，染色并在30倍放大倍率下观察，以评估峡部的发病率和显微解剖。在上颌第一磨牙的MB根和下颌第一磨牙的M根中，距顶点3 mm的峡部发生率分别为89.3％和100％。在两种类型的根中，距峡部3 mm的距离，峡部和远侧根表面之间的平均牙本质厚度<1 mm。在这个研究中，每当两个主管位于上颌第一磨牙的MB根和下颌第一磨牙的M根时，出现峡部的可能性就会增加。因此，临床医生应注意在非手术和手术根管治疗过程中上颌第一磨牙的MB根和下颌第一磨牙的M根的远端表面最薄。
更新日期：2020-01-27
中文翻译：
在韩国人口中，第一磨牙近中颊和中根的峡部地形分析。
这项研究的目的是评估峡部的发生率和显微解剖，以提供有关上颌第一磨牙的近颊（MB）根和下颌第一磨牙的近中（M）根的更精确的解剖信息。将28颗上颌磨牙和31颗下颌第一磨牙包埋，切片，染色并在30倍放大倍率下观察，以评估峡部的发病率和显微解剖。在上颌第一磨牙的MB根和下颌第一磨牙的M根中，距顶点3 mm的峡部发生率分别为89.3％和100％。在两种类型的根中，距峡部3 mm的距离，峡部和远侧根表面之间的平均牙本质厚度<1 mm。在这个研究中，每当两个主管位于上颌第一磨牙的MB根和下颌第一磨牙的M根时，出现峡部的可能性就会增加。因此，临床医生应注意在非手术和手术根管治疗过程中上颌第一磨牙的MB根和下颌第一磨牙的M根的远端表面最薄。
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