| 张炜崎,俞维君,姜滨,胡淑澄,郁利,陆尔奕.下颌智齿阻生类型及其邻牙远中邻面患龋情况的对称性初探[J].口腔材料器械杂志,2020,29(4):207-211. |
| 下颌智齿阻生类型及其邻牙远中邻面患龋情况的对称性初探 |
| A preliminary study on the symmetry of mandibular third molar and distal caries of adjacent mandibular second molar |
| 投稿时间：2020-01-16 修订日期：2020-03-17 |
| DOI：10.11752/j.kqcl.2020.04.06 |
| 中文关键词: 下颌第三磨牙 阻生齿 龋齿 Winter分类 |
| 英文关键词:Mandibular third molar Impacted tooth Dental caries Winter’s classification |
| 基金项目:上海市卫生和计划生育委员会项目（编号：201740181）；上海交通大学医学院附属仁济医院临床科研创新培育基金（编号：PYII-17-014） |
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| 中文摘要: |
| 目的 调查下颌第三磨牙生长情况的对称性及其对相邻第二磨牙远中邻面龋患病情况的影响，为临床早期预防性拔除下颌智齿提供依据。方法 纳入2019年11月1日至2019年11月23日在上海交通大学医学院附属仁济医院口腔科拍摄的全景片196张，调查其双侧下颌第三磨牙的对称性，通过卡方检验分析不同阻生类型的下颌第三磨牙与相邻第二磨牙远中邻面龋患病情况之间的关系。结果 双侧下颌第三磨牙对称者187例，占比95.41%。Winter分类中垂直阻生对称性（79.2%）显著高于近中阻生（47.6%）与水平阻生（59.1%）（P=0.001）； Winter分类为近中阻生（46.4%）和水平阻生（38.4%）的下颌第三磨牙，其相邻第二磨牙远中邻面龋发生率显著高于垂直阻生（23.6%）（P=0.001）。结论 下颌智齿具有对称性；为预防相邻第二磨牙远中邻面龋，近中阻生及水平阻生的下颌第三磨牙应在临床上早期预防性拔除。 |
| 英文摘要: |
| Objective The aim of this study was to investigate the symmetry of mandibular third molar and distal caries of adjacent mandibular second molar, and to provide references for early removal of mandibular third molars. Methods A total of 196 panoramic radiography images were included to investigate the symmetry of mandibular third molar. The relationship between the distal caries of the mandibular second molar and third molar impacted types was analyzed by chi-square test. Results 187 cases of bilateral mandibular third molars were symmetrical, accounting for 95.41%. In the Winter classification, the symmetry of vertical impacted third molar (79.2%) was significantly higher than that of mesioangular impacted (47.6%) and horizontal impacted third molar (59.1%) (P=0.001). For mesioangular impacted (46.4%) and horizontal impacted (38.4%) mandibular third molar, the incidence of caries in the distal surfaces of adjacent second molars was significantly higher than that of vertical impacted groups (23.6%) (P=0.001). Conclusion Mandibular third teeth are symmetrical. In order to prevent caries on the distal surface of the adjacent second molars, the mesiangular impacted and horizontal impacted third molars should be removed early. |
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