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目的:调查了解某部青年官兵第3磨牙阻生情况。方法:采用自行设计的调查表,随机抽取某部青年官兵464例,按照年龄分为3组:18～21岁为A组,216例;22～24岁为B组,118例;25～27岁为C组,130例。对第3磨牙萌出及阻生等情况进行调查,比较各组第3磨牙阻生率。结果:3个组第3磨牙阻生率分别为8.2%,8.7%和10.6%,第3磨牙阻生齿总数占全部第3磨牙的9.0%;第3磨牙以垂直和近中阻生比例较高;阻生发生在下颌概率显著高于上颌(P<0.05)。结论:第3磨牙的萌出数量随年龄增长逐年增加,应采取措施加以防治。
OBJECTIVE: To investigate and understand the obstruction of the third molar of a certain young soldier. Methods: A total of 464 young officers and men of a certain department were randomly divided into three groups according to their ages: group A (18-21 years old), group B (216 cases), group B (22-24 years), group B The age group C, 130 cases. The third molars eruption and occlusion were investigated, the incidence of the third molars in each group was compared. Results: The rates of impaction of the third molars in the three groups were 8.2%, 8.7% and 10.6%, respectively, and the total number of the impacted teeth in the third molars accounted for 9.0% of the total molars. The ratio of vertical and proximal molars in the third molars The probability of occlusion occurring in the mandible was significantly higher than that of the maxilla (P <0.05). Conclusion: The number of eruption of the third molar increases with age, and measures should be taken to prevent it.