CAD镜像复制上前牙形态效果的数学分析

发布时间：2018-02-24 19:54

本文关键词： 计算机辅助设计镜像生物再造堆蜡　出处：《口腔医学研究》2016年05期 　论文类型：期刊论文

【摘要】：目的:通过计算机辅助设计(computer aided design,CAD)评估镜像、生物再造和人工堆蜡模式形成的虚拟修复体与原始天然牙形态的数学匹配效果。方法:在20颗原始上颌天然牙(20位参与者)的石膏模型上行全瓷冠牙体预备,并扫描预备前后的模型,形成镜像(mirror-image,MI)、生物再造(biogenericreconstruction,BR)和人工堆蜡(waxed-ups,WU)的虚拟修复体和原始天然牙的图像(CEREC?software v4.0)。评估虚拟修复体与原始天然牙的三维距离(three-dimensional distance,3-DD)和体积变化率(rate of volume change,RVC)(Geomagic Qualifyv7.0,USA,输出),统计分析3种模式之间的差异(单因素方差分析和秩和检验,检验水平α=0.05)。结果:3-DD统计表明,MI与BR之间的差异无统计学意义;MI和BR与WU之间的差异有统计学意义(P0.05)。RVC统计表明,MI与BR和WU之间的差异有统计学意义(P0.05);BR与WU之间的差异无统计学意义。结论:CAD软件镜像恢复的上颌前牙修复体形态优于生物再造和人工制作,CAD镜像复制能有效的重建天然牙形态,是一种较理想的修复模式。
[Abstract]:Objective: to evaluate mirror image by computer aided design (CAD). The effect of mathematical matching between the virtual restoration and the original natural tooth shape formed by biological reengineering and artificial wax stowing. Methods: 20 participants in 20 primitive maxillary natural teeth) were prepared with plaster model uplink all ceramic crowns. And scan the models before and after preparation to form a mirror image of biogeneric construction BRB and artificial waxed-ups WU) virtual restoration and original natural tooth images CEREC???? Software v4.0. To evaluate the three-dimensional distance between virtual restoration and primitive natural teeth and to evaluate the volume change rate of volume change rate of volume qualifyv7.0, output, and statistical analysis of the differences among the three models (univariate ANOVA and rank sum test), and to analyze the difference between the three models (univariate ANOVA and rank sum test), and to analyze the difference between the three models (univariate ANOVA and rank sum test), and to analyze the difference between the three models (univariate ANOVA and rank sum test). Results there was no significant difference between Br and Br according to the ratio 3-DD statistics. There were significant differences between MI and Br and between Br and WU. RVC statistics showed that there was a significant difference between Br and Br and between Br and WU. Conclusion the reconstruction of maxillary anterior teeth with the image image of the 10% CAD software is superior to that of biological reconstruction and artificial CAD image reconstruction, which can effectively reconstruct the natural tooth shape. It is an ideal repair mode.
【作者单位】：厦门市口腔医院综合科;厦门市口腔医院;
【基金】：福建省自然科学基金(编号:2013D010)
【分类号】：R783

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