摘要
目的：探讨下颌第二磨牙错位的类型及相关因素，为口腔正畸诊断和治疗提供参考。方法：随机抽取100例符合条件的正畸患者，男27例，女73例，平均年龄17．68±1．24岁（12．0～37．5岁）。在记存模型上评估下颌第二磨牙的错位情况，测量Spee曲线曲度和下颌牙槽弓在第二磨牙处的宽度，结合X线曲面断层片测量下颌后段牙弓拥挤度，对测量值进行统计分析。结果：下颌第二磨牙错位发生率约为45％，其中舌侧倾斜占70％。下颌第二磨牙错位与安氏Ⅱ类错殆、第二磨牙处的下颌牙槽弓宽度存在高度显著相关性（P〈0．01），而与后段牙弓拥挤度和Spee曲线曲度无明显相关性（P〉0．05）。结论：下颌第二磨牙错位发生率高。且以舌向倾斜多见，应常规纳入治疗计划。下颌第二磨牙错位可能与第二磨牙处的下颌局部牙槽弓宽度有关，而与后段牙弓拥挤度无关。
Objective：To investigate factors related to the malocclusion of lower second molars. Method：Position of lower second molars and the width of mandibular alveolar arch at the second molar level were recorded and space analysis on mandibular posterior .segment of each subject were performed. Data was analyzed with software SASS. 12. Result： Lo- gistic regression revealed significant correlation in width of lower alveolar arch at the lower second molar level between the patients with and without malocclusion of the lower second molar（P 〈 0.01）, However, no significant correlation were es- tablished in posterior space deficiency（P 〉0.05）. Conclusion： The malposition of the lower second molars was not correlated with the posterior segment discrepancy while it did tend to occur more frequently in the patients with narrower alveolar arch width at the second molar level.
出处
《临床口腔医学杂志》
2006年第4期200-202,共3页
Journal of Clinical Stomatology
关键词
错位
第二磨牙
拥挤度
牙槽弓宽度
malocclusion
second molar
crowding
alveolar arch width
