广州市正常牙合青少年临床牙冠中心高度的研究(1)
第1页 |
参见附件(1724KB,3页)。
[摘要]目的:通过测量广州市正常牙合青少年人群临床牙冠长度、临床牙冠中心高度来探讨托槽的高度定位。方法:制取59例广州市正常牙合青少年人群的牙颌模型,使用数显游标卡尺测量临床牙冠高度及临床牙冠中心高度,对测量结果进行统计学分析。结果:广州市正常牙合青少年人群的临床牙冠中心高度呈正态性分布。同名牙临床牙冠中心高度测量值无性别差异(P>0.05)。结论:①广州市正常牙合青少年人群临床牙冠中心高度差异较小;②临床冠中心托槽定位法具有局限性。
[关键词]临床牙冠中心;托槽高度;正常牙合
[中图分类号]R783.5 [文献标识码]A[文章编号]1008-6455(2011)01-0115-03
Study on the center height of clincal crowns of normal occlusion in Guangzhou teenagers
LIN Ting1,LAN Ze-dong2
(1.College of Dentistry of Fujian Medical University,Fuzhou 350002,China;2.Yangcheng Hospital of Guangzhou Medical College & Stomatology Hospital of Guangzhou Medical University)
Abstract: Objective To investigate the height of clinical crowns and the center height of clinical crowns on normal occlusion of Guangzhou teenagers, together with the relationship between the center height of clinical crowns and bracket positioning for the patients with abnormal occlusion in Guangzhou area. Methods The data were systematically derived from 59 people with normal occlusion in Guangzhou area, The height of clinical crown and the center height of clinical crown were measured with a vernier, and the data were statistically analyzed with statistic methods. Results The distribution of the center height of clinical crowns according the normal distribution and there was no statistical difference between male and female for the center height of clinical crown (P>0.05).Conclusion①The difference of the center height in clinical crowns among individuals with normal occlusion in Guangzhou area was minor; ②Position brackets according to the center height in clinical crowns had limitation in clinical practice.
Key words: clinical height of crown center; bracket placement; normal occlusion
20世纪70年代,Andrews对120名未经正畸治疗的正常牙合人群的牙牙合模型进行研究,提出了“正常牙合的6项标准[1],并在此基础上创立了直丝弓矫治技术。他认为正常牙合牙列中各牙齿的临床牙冠中心点处于同一平面上(即Andrews平面),也提倡在直丝弓矫治技术中,一般应将托槽槽沟的中心点粘贴在牙齿的临床牙冠中心点上[2]。但临床牙冠中心高度的定位易受到各种主、客观因素的影响。因此,Roth[3]、McLaughlin[4-5]等根据各自托槽系统的特点给出了一些托槽粘贴高度参考值来辅助临床粘贴。近年来,国内杨新海[6]、刘东旭[7]等也对临床牙冠中心高度进行了一些研究,认为正常牙合临床牙冠中心高度具有种族、地区差异,临床应用时应参考本国本地区的定位数值。到目前为止,关于广东地区正常牙合青少年临床牙冠中心高度的研究尚未见报道。因此,本研究选择广州市正常牙合青少年的牙颌模型为研究对象,进行测量分析,以建立广州市正常牙合青少年临床牙冠高度及临床牙冠中心高度的正常值,从而探讨如何进行托槽垂直向高度的定位,为正畸临床提供依据。
1材料和方法
1.1 研究对象:与当地保健所合作,对广州市中小学生进行筛查,筛选出59例14~17岁正常牙合青少年,其中男性28名,女性31名 ......
您现在查看是摘要介绍页,详见PDF附件(1724KB,3页)。