口腔医学研究

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (5): 524-526.DOI: 10.13701/j.cnki.kqyxyj.2016.05.025

• 临床研究论著 • 上一篇    下一篇

CAD镜像复制上前牙形态效果的数学分析

李瑞莺1 ,姚江武2*   

  1. 1. 厦门市口腔医院综合科 福建 厦门 361003;
    2. 厦门市口腔医院 福建 厦门 361003
  • 收稿日期:2015-12-23 出版日期:2016-05-26 发布日期:2016-05-26
  • 通讯作者: 姚江武,电话:0592-2678588
  • 作者简介:李瑞莺(1976~ ),女,福建莆田人,主治医师,学士,主要从事口腔修复学工作。
  • 基金资助:
    福建省自然科学基金(编号:2013D010)

Mathematical Analysis of Duplicating upper Anterior Tooth Morphology by CAD Mirror-image.

LI Rui-ying1, YAO Jiang-wu2*.   

  1. 1. Stomatological College of Fujian Medical University, Fuzhou 530001, China;
    2. Stomatologic Hospital of Xiamen Medical College, Xiamen 361001, China
  • Received:2015-12-23 Online:2016-05-26 Published:2016-05-26

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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(P<0.05)。RVC统计表明,MI与BR和 WU之间的差异有统计学意义(P<0.05);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。

关键词: 计算机辅助设计, 镜像, 生物再造, 堆蜡

Abstract: Objective: To assess the mathematical match virtual prostheses reconstructed by the modes of mirror-image (MI),biogenericreconstruction (BR), and wax-ups (WU) on the original upper anterior tooth morphology. Methods: Twenty intact upper anterior teethwere included. Preparations of all ceramic crowns were performed on the gypsum model and scannedbefore and afterpreparations. The virtual prostheses were formed by the MI, BR, and WU as well as the original teeth (CEREC software v4.0). Discrepancies were evaluated by matching the scans with the original morphologies using the parameters of three-dimensional distance (3-DD) and rate of volume change(RVC)(Geomagic Qualifyv7.0, USA). Datawere analyzed by one-way ANOVA and rank sum test. Results: 3-DD differences of MI and BR were significantly less than those of WU (P<0.05), but there was nosignificant difference between MI and BR. There were significant differences in RVC between MI and BR as well as WU (P<0.05), but no significant differences were found between BR and WU. Conclusion: The MI model enables a closer reconstruction of upper anterior teeth than BR and WU.

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