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目的了解国人隐裂牙的患病率及其相关因素,为隐裂牙的大样本研究奠定基础。方法于2011年10月～2012年5月,采用多阶段等容量随机抽样及单纯随机抽样的方法,分别调查18～27岁西安交通大学在校大学生及35～64岁西安交通大学口腔医院门诊患者,大学生组总有效人数700名,男性432名,女性268名。门诊患者组总有效人数350例,男性147例,女性203例。按照美国AAE隐裂牙诊断标准进行调查。以各类型隐裂牙患病率作为统计指标,采用SPSS13.0软件包对数据进行统计分析。结果牙釉质裂、牙尖折裂、牙齿劈裂、牙隐裂患病率分别为:大学生组68.0%、2.7%、0.4%、3.9%,门诊患者组41.7%、4.6%、10.0%、8.6%。男女间患病率无显著性差异(P>0.05)。喜食硬物习惯及咬合面充填体与隐裂牙相关(P<0.05),安氏各类错牙合与隐裂牙无关(P>0.05)。结论中老年隐裂牙患病率较高,喜食硬物习惯及咬合面充填体是隐裂牙的相关因素。
Objective To understand the prevalence of fractured tooth in Chinese and its related factors, and to lay a foundation for the study of large specimens of cracked tooth. Methods From October 2011 to May 2012, multi-stage, equal-capacity random sampling and simple random sampling were used to survey the students aged 18-27 years in Xi’an Jiaotong University and the patients aged 35-64 years in Xi’an Jiaotong University Stomatological Hospital , The total valid number of university students 700, 432 males and 268 females. Outpatient group total effective number of 350 cases, 147 males and 203 females. According to the American AAE cracked tooth diagnostic criteria for investigation. With the prevalence of various types of cracked teeth as a statistical indicator, using SPSS13.0 software package for statistical analysis of the data. Results The prevalences of enamel crack, cusp tip, tooth splitting and occlusion were 68.0%, 2.7%, 0.4% and 3.9% in university students group, 41.7%, 4.6%, 10.0% and 8.6% in outpatient group %. There was no significant difference between male and female (P> 0.05). Habit of eating hard objects and occlusal fillers were associated with fractured teeth (P <0.05). All kinds of malocclusion did not show any correlation with fractured teeth (P> 0.05). Conclusion The prevalence of occult tooth in middle-aged and elderly patients is high. The habit of eating hard objects and the filling of occlusal surface are the related factors of the cracked tooth.