345例青少年恒磨牙发育情况的回顾性研究

发布时间：2018-10-21 18:04

【摘要】：目的分析常州市11~14岁青少年恒磨牙(主要是第二磨牙M2和第三磨牙M3)的影像学表现,横向研究恒磨牙的发育、萌出情况,以及M3、M2的发育关系。方法从常州市口腔医院影像资料中抽取2013年1~10月期间拍摄的11~14岁青少年的全颌曲面断层片共345张,分别观察M3、M2的发育情况并进行发育分期,分析两者的相关性。结果在11~14岁青少年中,M2处于发育G期的比例为43.26%,下颌整体发育早于上颌(Z=-11.69,P0.001),女性较男性发育早(Z=-3.06,P=0.002);21颗阻生,均为下颌近中倾斜,占下颌M2总数的3.04%。M3处于发育C期的比例为33.26%,女性比男性发育早(Z=-2.06,P=0.040),下颌M3发育早于上颌(Z=-3.42,P=0.001)。经Spearman相关分析,M3与M2存在相关性(r=0.869,P0.001)。结论青少年中M2与M3的发育密切相关,除去生长因素外、上下颌牙弓后段能否同时容纳、是否容易导致复发等,在正畸治疗时需要充分考虑两者的关系。
[Abstract]:Objective to analyze the imaging features of permanent molars (M2 and M3) of 1114 year old adults in Changzhou City, and to study the development and eruption of permanent molars and the relationship between M3M 2 and M3 M 2. Methods from January to October 2013, 345 tomograms were taken from the imaging data of Changzhou Stomatological Hospital. The development of M3M 2 was observed and the correlation between them was analyzed. Results among the adolescents aged 11 to 14 years, the proportion of M2 in the developmental G stage was 43.26, the whole mandibular development was earlier than that of the upper jaw (ZP0.001), the development of females was earlier than that of males (ZP0. 002), and the 21 impacted males were all proximal and middle mandibular obliquity. The proportion of 3.04%.M3 in C stage of mandibular M2 was 33.26. The development of M3 in female was earlier than that in male (Z-2.06P0. 040), and the development of M3 in mandible was earlier than that in maxilla (ZG3. 42P0. 001). By Spearman correlation analysis, there was a correlation between M 3 and M 2 (r = 0.869, P 0.001). Conclusion M2 is closely related to the development of M3 in adolescents. Besides growth factors, whether the posterior segment of upper and mandibular arch can accommodate at the same time and whether it can easily lead to recurrence should be fully considered in orthodontic treatment.
【作者单位】：安徽医科大学口腔医学院·附属口腔医院安徽省口腔疾病研究中心实验室;常州市口腔医院正畸科;安徽医科大学第四附属医院口腔科;
【基金】：常州市卫生局指导性项目(WZ201314)
【分类号】：R783.5

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