下颌第一恒磨牙根尖形态的显微CT研究

doi:10.13701/j.cnki.kqyxyj.2016.09.011

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (9): 937-940.DOI: 10.13701/j.cnki.kqyxyj.2016.09.011

下颌第一恒磨牙根尖形态的显微CT研究

闵艺¹,何淼¹,卢冠凡^2*

1. 武汉大学口腔医学院牙体牙髓病科湖北武汉 430079;
2. 青岛市口腔医院山东青岛 260000

收稿日期:2016-07-07 出版日期:2016-09-26 发布日期:2016-09-26
通讯作者: 卢冠凡,电话:0532-82821350
作者简介:闵艺(1979~ ),女,湖北人,主治医师,博士,主要从事口腔牙体牙髓病临床和基础研究。
基金资助:
国家自然科学基金(编号:81300870)

Investigation on Apical Morphology of Mandibular First Molar Using Micro-computed Tomography

Yi¹, HE Miao¹, LU Guan-fan^2*

1. School of Stomatology, Wuhan University, Wuhan 430079, China;
2. Qingdao Stomatological Hospital, Qingdao 260000, China.

Received:2016-07-07 Online:2016-09-26 Published:2016-09-26

摘要/Abstract

摘要： 目的:使用显微CT研究下颌第一恒磨牙根尖5 mm形态。方法:采用显微CT对152颗离体下颌第一恒磨牙进行扫描,利用3-D软件三维重建根尖5 mm形态。记录根尖孔和侧副孔数目、峡区发生和分型。结果:94.08%下颌第一恒磨牙有两个单独牙根,61.84%有3个根管。60.91%的近中根有两个根尖孔。37.27%的近中根和33.01%的远中根有侧副孔。73.68%的牙出现峡区,峡区形态以IV型最为常见。结论:下颌第一磨牙根尖形态复杂,常规根管治疗和根尖手术应考虑其复杂性。

关键词: 显微CT, 下颌第一磨牙, 峡区, 根尖形态

Abstract: Objective: To investigate the apical morphology of the mandibular first molar in Chinese population using micro-computed tomographic technique. Methods: A total of 152 mandibular first molars were scanned by micro-competed tomography with the resolution of 30 μm. The 3-dimensional (3D) images of all specimens in apical 5mm of the roots were reconstructed. The numbers of roots and root canal, the numbers of apical foramina and lateral/accessory foramina, the prevalence and types of isthmus were recorded. Results: The incidence of two separated roots of the first molars was 94.08%. The incidence of three separated roots was 61.84%. The percentage of two apical foramina in the mesial roots was 60.91%. The percentage of lateral/accessory foramina was 37.27% in the mesial roots and was 33.01% in the distal roots. The incidence of root canal isthmus was 73.68%. Type IV in isthmuses was the most common configurations. Conclusion: The apical canal configuration of mandibular first molars was complicated and should be taken into account during nonsurgical and surgical endodontic procedures.

Key words: Micro-computed tomography, Mandibular first molars, Isthmus, Apical morphology

中图分类号:

R781.2

闵艺,何淼,卢冠凡. 下颌第一恒磨牙根尖形态的显微CT研究[J]. 口腔医学研究, 2016, 32(9): 937-940.

Yi , HE Miao , LU Guan-fan. Investigation on Apical Morphology of Mandibular First Molar Using Micro-computed Tomography[J]. Journal of Oral Science Research, 2016, 32(9): 937-940.

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下颌第一恒磨牙根尖形态的显微CT研究

Investigation on Apical Morphology of Mandibular First Molar Using Micro-computed Tomography

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