| 李惠玲,李志艳,程丽东,宁立强,梁 楠.青海地区藏汉族人群下颌第二磨牙根管形态的锥形束CT研究[J].,2019,19(21):4152-4156 |
| 青海地区藏汉族人群下颌第二磨牙根管形态的锥形束CT研究 |
| A CBCT Study on the Root Canal Morphology of Mandibular Second Molar in the Tibetan and Han Nationality in Qinghai |
| 投稿时间：2019-05-06 修订日期：2019-05-30 |
| DOI：10.13241/j.cnki.pmb.2019.21.034 |
| 中文关键词: 青海地区 藏族 汉族 下颌第二磨牙 牙根管 |
| 英文关键词: Qinghai area Tibetan Han nationality Mandibular second molar Root canal |
| 基金项目:青海省科技厅应用基础研究项目(2014-ZJ-759) |
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| 中文摘要: |
| 摘要 目的：采用锥形束CT(Cone Beam CT，CBCT)技术探讨青海地区藏汉族人群下颌第二磨牙根管形态、数量以及C型根管发生率和髓腔差值的异同。方法：从2016年5月到2018年12月青大附院口腔门诊牙齿CBCT扫描结果中选择藏、汉民下颌第二磨牙各300颗，其中汉族150例，藏族150例。按照Vertucci分类对根管进行分型，探究青海地区藏、汉族人群下颌第二磨牙根管形态特点，同时对牙根类型、C型根管数量和发生率进行统计研究。结果：青海地区藏汉族人群下颌第二磨牙牙根类型以双根牙为主，且其在藏族人群中的发生率高于汉族人群。青海地区藏汉族人群下颌第二磨牙的根管分型以Ⅰ型和C型根管所占比例最高。在青海地区汉族人群和藏族人群下颌第二磨牙中，C形根管所占比率分别为40.7%和27.0%，汉族人群C型根管发生率显著高于藏族人群(P<0.05)。在青海地区藏汉人群下颌第二磨牙中，女性的发生率显著高于男性(P<0.05)。青海地区藏族人群的MB-DB、DB-P平均值显著高于汉族人群(P<0.05)。结论：青海地区藏汉族人群下颌第二磨牙根管形态基本类似，C型根管发生率汉族人群是远远大于藏族人群的，具有一定的种族差异性。但是C型根管发生率在青海地区藏汉人群中都是女性大于男性。同时藏族人群髓腔差值也具有一定的种族差异性。 |
| 英文摘要: |
| ABSTRACT Objective: Cone beam CT (CBCT) technique was used to investigate the similarities and differences of root canals, the incidence of C-type root canals and the difference of medullary cavity in Tibetan and Han populations in Qinghai area. Methods: From May 2016 to December 2018, the CBCT scan results of the teeth of the oral outpatients of the Qingda Affiliated Hospital were selected from 300 Tibetan and Han people's mandibular second molars, including 150 Hans and 150 Tibetans. The root canal was classified according to Vertucci classification. To explore the root canal morphology of the mandibular second molar in Tibetan and Han nationalities in Qinghai, and the root root type and C-type root canal number and incidence rate were statistically studied. Results: The root types of the mandibular second molars in the Tibetan Han population in Qinghai area are mostly double root teeth. And its incidence rate in the Tibetan population is higher than that in the Han population. The root canal classification of the mandibular second molars in Tibetan and Han nationalities in Qinghai has the highest proportion of I-type and C-type root canals. In the mandibular second molars of the Han and Tibetan populations in Qinghai, the proportion of C-type root canals was 40.7% and 27.0%, respectively. The incidence of C-type root canals in the Han population was significantly higher than that in the Tibetan population (P<0.05). And in the mandibular second molars of Tibetan and Han people in Qinghai, the incidence of females was significantly higher than that of males (P<0.05). The mean MB-DB and DB-P of the Tibetan population in Qinghai were significantly higher than those in the Han population (P<0.05). Conclusion: The root canal morphology of the mandibular second molar in the Tibetan-Han population in Qinghai is similar. The incidence of C-type root canal is far greater than that of the Tibetan population, and it has certain racial differences. However, the incidence of C-type root canal is higher in women than in men in Tibetan and Han people in Qinghai. At the same time, the differences in the medullary cavity of the Tibetan population also have certain racial differences. |
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