摘要
目的:对上下颌第二恒磨牙拔除后第三磨牙自行迁移的情况进行观察、比较。方法:将27例病例分为上颌组和下颌组,上颌组15例拔除上颌第二恒磨牙,下颌组12例拔除第二恒磨牙。两组在治疗前和治疗1年后分别拍摄术前及术中X线侧位头影测量片,测量第三磨牙在水平方向、垂直方向移动距离,同时记录所有病例第三磨牙临床萌出情况,并对两实验结果进行统计学分析、比较。结果:上颌组上颌第三磨牙在水平方向和垂直方向分别移动7.83mm、7.73mm,下颌组下颌第三磨牙在水平方向和垂直方向分别移动6.12mm、4.97mm,上下颌间无统计学意义,除下颌组一名患者之外,其余患者第三磨牙均已萌出,两组间无显著统计学差异。结论:无论上颌、下颌,拔除第二恒磨牙都是一种良好的拔牙模式。
Objective Observing and comparing the automatical drift of the third molar after the extraction of the maxillary and mandibular second molar. Methods 27 patients were divided into the maxillary group and the mandibular group. The maxillary group consisted of 15 cases and was extracted the maxillary second molar. The mandibular group consisted of 12 cases and was extracted the mandibular second molar. The horizontal and vertical moving distances of the third molar of all cases were recorded with cephalometric analysis, at the same time, the eruption of the third molar of all cases was clinically observed. Then, the result of the experiments were statistically analyzed and compared. Results The horizontal and the vertical moving distances of the maxillary third molar are 7.83mm and 7.73mm in the maxillary group, and the horizontal and the vertical moving distances of the mandibular third molar are 6.12mm and 4.97mm in the mandibular group. Except for the eruption of the third molar of one patient in mandibular group, the eruptions of the third molar of the other patients are good. There were no significant differences in the result of all above experiments. Conclusion Whichever you choose, the maxilla or the mandible, extraction of the second molar is a good extracting model.
出处
《中国美容医学》
CAS
2009年第11期1663-1665,共3页
Chinese Journal of Aesthetic Medicine
关键词
第二恒磨牙拔除
第三磨牙迁移
上下颌
extraction of the second molar
the drift of the third molar
the maxilla and mandible
