华西口腔医学杂志

• 临床研究 • 上一篇    下一篇

种植体计算机辅助设计和制造导板精度的评价

刘洪1 刘东旭1 王克涛2 王春玲1 赵臻1   

  1. 1.山东大学口腔医学院山东省口腔生物医学重点实验室;2.山东大学齐鲁医院口腔颌面外科, 山东济南250012
  • 收稿日期:2010-10-25 修回日期:2010-10-25 出版日期:2010-10-20 发布日期:2010-10-20
  • 通讯作者: 刘东旭,Tel:0531-88382070
  • 作者简介:刘洪(1985—),男,山东人,硕士
  • 基金资助:

    山东省科技厅科技攻关基金资助项目(2008GG30002019,2008-GG30001001);山东大学口腔医学院2009年临床创新基金资助项目

Accuracy evaluation of computer aided design and computer aided manufacture template for implant placement

LIU Hong1, LIU Dong-xu1, WANG Ke-tao2, WANG Chun-ling1, ZHAO Zhen1   

  1. 1. Shandong Provincial Key Laboratory of Oral Biomedicine, College of Stomatology, Shandong University, Jinan 250012, China; 2. Dept. of Oral and Maxillofacial Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
  • Received:2010-10-25 Revised:2010-10-25 Online:2010-10-20 Published:2010-10-20
  • Contact: LIU Dong-xu,Tel:0531-88382070

摘要:

目的利用三维重建软件设计并制作基于CT数据的计算机辅助设计和制造(CAD/CAM)导板,评价导板的精度。方法选择4个下颌骨标本,制作石膏模型,设计并制作基于CT数据的CAD/CAM导板。在导板辅助下于下颌骨标本的后牙段植入14枚种植体,再次行CT扫描,采用点对点配准技术实现扫描前后CT三维重建模型的配准,测量实际种植体位置与虚拟放置的种植体位置间的偏离值,评价导板的精度。结果14枚种植体植入后头部偏差量为(0.47±0.12)mm,颊舌向和近远中向以及垂直向偏离值分别为(0.22±0.08)mm、(0.25±0.06)mm、(0.30±0.11)mm。尾部偏差量为(0.19±0.07)mm,角度偏差量为1.79°±0.68°。结论在CAD/CAM导板辅助下于下颌骨模型植入种植体具有较高的精度,对于辅助临床种植体植入具有较高的价值。

关键词: 计算机辅助设计和制造, 导板, 种植体, 精度, 配准

Abstract:

Objective The computer aided design and computer aided manufacture(CAD/CAM) template was fabricated basing on CT data of completely edentulous jaws, and the accuracy of template was evaluated by assessment of the deviation between the actual and planning position of the implant after the registration of pre- and postoperative CT images. Methods The CAD/CAM templates for 4 completely edentulous jaws were designed and fabricated basing on the pre-operative CT data and the stone models of the jaws sample. And 14 implants were placed in the posterior region of the jaws aided by the CAD/CAM template. The pre- and post-operative CT was registered by the point to point method, and the deviation between actual and virtual implants was measured to assess the accuracy of the template. Results With the aid of CAD/CAM template, the deviations of the position at the tail of the implant, at the tip of the implant and the projected deviation of angle were (0.19±0.07)mm, (0.47±0.12)mm, and 1.79°±0.68° respectively, and the deviations of the position at the bucco-palatal, disto-mesial, vertical direction were (0.22±0.08)mm, (0.25±0.06)mm, (0.30±0.11)mm at the tip respectively. Conclusion Within the limits of this study, the results verify the accuracy of CAD/CAM template and support its use for safety implant placement.

Key words: computer aided design and computer aided manufacture, template, implant, accuracy, registration