Growth prediction of mandible by using a computed X-ray densitometry method

使用计算 X 射线密度测定法预测下颌骨生长

基本信息

批准号：
05454552
负责人：
MITANI Hideo
金额：
$ 4.42万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05454552/
关键词：
bone mineral density CXD method mandibular growth SIGMA GS D hand bone X-ray late adolescent period second metacarpal bone maturity indicator 下顎骨全体長身長重回帰分析成長予測アルミニウム階段初経パーソナル・コンピュータ

项目摘要

The purpose of this study was to examine the relationship between mandibular growth and the value of bone mineral density by using computed X-ray densitometry (CXD) method. All of subjects consisted of 199 girls and 68 boys aged from 6 to 19 years at initial stage. The materials used were serial hand bone X-rays taken with an aluminum step-wedge ruler, lateral cephalograms and standing height data. The following annual increments were obtained-Cd-Go, Go-Pog', Cd-Gn from cephalograms, SIGMA GS/D,GSmax, GSmin, MCI,D,d, L from second metacarpal image by using "Bonalyzer" (Teijin Ltd.).Results were as follows :1. It indicated that peak velocity of SIGMA GS/D was about 2-year later than that of D,L and standing height, and 1-year around menarche in girls.2. There were significantly positive correlation coefficients between annual increments of total mandibular length and that of standing height, SIGMA GS/D,D and L during puberty.3. It showed no correlation between facial type and value of SIGMA GS/D.4. In girls, it significantly showed negative correlation between annual increment of total mandibular lengh and three parameters (SIGMA GS/D,MCI and L) at initial stage, and in boys, only SIGMA GS/D showed negative correlation during puberty. But both of them, there was no correlation before puberal growth period.From multiple regression analysis with annual increments of mandible as criterion variable and paraneters of CXD method as predictor variables were applied, it should that multiple correlation coefficients was 0.7-0.9 in late adolescent period in boys.When multiple regression equation was applied, the error between true annual increments of mandible and predicted value were 0.5-1.0 mm in girls, and 1.0-2.0 mm in boys.Above all, it indicated that the parameters obtained by CXD method were useful for the evaluation of individual skeletal maturation and mandibular growth potentiality in later adolescent period, especially in boys.

这项研究的目的是使用计算的X射线密度法（CXD）方法检查下颌生长与骨矿物质密度的价值之间的关系。所有受试者包括199名女孩和68名在初期6至19岁的男孩。所使用的材料是用铝制式钢丝标尺，外侧头部图和站立高度数据进行的连续手骨X射线。通过使用“ bonalyzer”（Teijin Ltd。），从第二个掌掌图像中获得了以下年度增量，从头孢符号，Sigma GS/D，GSMAX，GSMIN，MCI，D，D，D，L中获得CD-GN，Sigma GS/D，GSMAX，GSMIN，MCI，D，D，L。这表明Sigma GS/D的峰值速度比D，L和站立高度的速度约2年，而Girls.2。在青春期期间，每年的下颌长度的年度增量和站立高度的年度增量（Sigma gs/d，d和l）之间存在显着正相关系数。3。它显示出Sigma GS/d.4的面部类型和价值之间没有相关性。在女孩中，在初始阶段，每年的下颌LENGH年度增量与三个参数（Sigma GS/D，MCI和L）之间显着表示负相关，而在男孩中，只有Sigma GS/D在青春期期间显示出负相关性。但是他们俩都在青春期生长期之前没有相关性。从多元回归分析以每年的下颌骨增量为标准变量和CXD方法的偏离者，作为应用预测变量，应多次相关系数为0.7-0.9，在男孩中的年度差异为0.7-0.9。女孩和1.0-2.0 mm的男孩。