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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.

本研究的目的是探讨下颌骨生长与骨密度值的关系，采用计算机X线密度测量法（CXD）。所有受试者包括199名女孩和68名男孩，年龄从6岁到19岁。所使用的材料是用铝阶梯楔形尺拍摄的连续手骨X光片、侧位头颅X光片和站立高度数据。采用帝人公司Bonalyzer型X线头颅X线片测量Cd-Go、Go-Pog '、Cd-Gn，第二掌骨片测量SIGMA GS/D、GS_（max）、GS_（min）、MCI、D、d、L。结果如下：1.说明SIGMA GS/D的峰值速度比D、L和站立高度的峰值速度晚2年左右，女孩在月经初潮前后1年左右.青春期下颌骨总长度的年生长量与身高、SIGMA GS/D、D、L的年生长量呈显著正相关.不同的面型与SIGMA GS/D值无相关性。女生下颌骨总长度的年增长量在发育初期与SIGMA GS/D、MCI和L呈显著负相关，男生在青春期仅与SIGMA GS/D呈显著负相关。以下颌骨年生长量为标准变量，以CXD法各项指标为预测变量进行多元回归分析，结果表明，在青春期后期，男性下颌骨年生长量与CXD法各项指标的复相关系数为0.7-0.9，应用多元回归方程，下颌骨实际年生长量与预测值的误差女生为0.5- 1.0mm，男生为1.0- 2.0mm。提示CXD法所获得的参数可用于评价青少年后期个体，尤其是男孩的骨骼发育和下颌骨生长潜力。