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| 后牙区正畸托槽定位高度的研究 | |
| 引用本文： | 顾泽旭,段银钟,丁寅,李变瑢,束嫘,陈学鹏. 后牙区正畸托槽定位高度的研究[J]. 华西口腔医学杂志, 2008, 26(3): 271-274 |
| 作者姓名： | 顾泽旭 段银钟 丁寅 李变瑢 束嫘 陈学鹏 |
| 作者单位： | 第四军医大学口腔医院正畸科,第四军医大学口腔医院正畸科,第四军医大学口腔医院正畸科,第四军医大学口腔医院正畸科,第四军医大学口腔医院正畸科,第四军医大学口腔医院正畸科陕西西安710032,陕西西安710032,陕西西安710032,陕西西安710032,陕西西安710032,陕西西安710032 |
| 摘 要： | 目的测量正畸患者后牙段牙齿边缘嵴到牙尖的垂直高度，为后牙托槽的定位提供参考。方法选择采用非拔牙矫治且矫治后符合Andrews正常标准的60例患者为研究对象，男女各30例，平均年龄13.2岁。取矫治后的研究模型，利用激光三维测量仪测量每副模型后牙段牙齿边缘嵴到近中牙尖最高点的垂直距离。数据输入SPSS6.0软件进行统计分析。结果相同牙位不同性别的数据无统计学差异；上下颌左右侧相同牙位边缘嵴到牙尖的高度无统计学差异（P>0.05）。上颌第一前磨牙、第二前磨牙和第一磨牙边缘嵴到牙尖的高度分别为（1.70±0.50）、（1.24±0.45）、（0.83±0.40）mm，三者间比较均有统计学差异（P<0.01）；下颌第一前磨牙、第二前磨牙和第一磨牙边缘嵴到牙尖的高度分别为（2.25±0.45）、（1.55±0.45）、（1.18±0.40）mm，三者间比较均有统计学差异（P<0.01）。将本研究得出的数值按最接近0.5 mm倍数的数值进行舍入，得到推荐的托槽垂直定位高度。结论为了获得良好的矫治效果，使矫治后后牙边缘嵴处于同一平面，后牙托槽的垂直定位高度推荐为：若第一磨牙颊面管高度为X mm，则第二前磨牙托槽的垂直高度为（X+0.5）mm，第一前磨牙则为（X+1.0）mm。 |
| 关 键 词： | 边缘嵴 托槽定位 直丝弓 |
| 文章编号： | 1000-1182(2008)03-0271-04 |
| 收稿时间： | 2008-06-25 |
| 修稿时间： | 2007-05-02 |
Study on the height of marginal ridge to cusp in posterior teeth and its effect on brackets placement |
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| GU Ze-xu,DUAN Yin-zhong,DING Yin,LI Bian-rong,SHU Lei,CHEN Xue-peng. Study on the height of marginal ridge to cusp in posterior teeth and its effect on brackets placement[J]. West China journal of stomatology, 2008, 26(3): 271-274 | |
| Authors: | GU Ze-xu DUAN Yin-zhong DING Yin LI Bian-rong SHU Lei CHEN Xue-peng |
| Affiliation: | Dept. of Orthodontics, College of Stomatology, The Fourth Military Medical University, Xi′an 710032, China |
| Abstract: | OBJECTIVE: To measure the vertical height of mesio-distal marginal ridge to cusp in posterior teeth, which may be helpful to brackets positioning. METHODS: The study groups comprised of 60 patients (30 men, 30 women, mostly aged 12-14 years) who underwent orthodontic treatment without tooth extraction and matched the Andrews normal occlusion standard after treatment. Study model of each patient was made. Three-dimensional laser measurer was used to evaluate the vertical height of mesio-distal marginal ridge to mesial cusp in posterior teeth. The data were stored in a personal computer and submitted to statistical analysis of paired t test. RESULTS: No statistical significant difference was found in the same teeth between men and women. Not only in maxilla but also in mandible, there was no significant difference between the left and the right (P>0.05). The average vertical height of maxillary first premolars was (1.70+/-0.50) mm, the maxillary second premolars was (1.24+/-0.45) mm, and for maxillary first molars, the result was (0.83+/-0.40) mm. The difference between each result was statistically significant (P9< 0.01). The average vertical height of mandibular first premolars was (2.25+/-0.45) mm, the mandibular second premolars was (1.55+/-0.45) mm, and for mandibular first molars, the result was (1.18+/-0.40) mm. The difference between each result was statistically significant (P<0.0 1). CONCLUSION: The vertical height of brackets position in posterior teeth should be considered to guarantee that mesio-distal marginal ridges of deferent posterior teeth located in the same plane, so that satisfying goal could be achieved, If the vertical height in the first molar was X mm, the vertical height in the second premolar should be (X+0.5) mm, and (X+1.0) mm might be suit for the first premolar. |
| Keywords: | marginal ridge bracket positioning preadjusted appliance |
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