Optical impression method to measure three-dimensional position and orientation of dental implants using an optical tracker
Optical impression method to measure three-dimensional position and orientation of dental implants using an optical tracker
复制标题
使用光学跟踪仪测量牙种植体三维位置和方向的光学印模方法
DOI：
10.1111/j.1600-0501.2012.02519.x
复制
发表时间：
2013
影响因子：
4.3
通讯作者：
Yatani H
中科院分区：
文献类型：
--
作者：
Ono S;Yamaguchi S;Kusumoto N;Nakano T;Sohmura T;Yatani H
本研究的目的是设计一种能准确、快速地制作种植体印模的光学印模方法。材料与方法制备了4个纸质标记(4×10 mm、8×6 mm、16×12 mm、24×18 mm)和1个钛标记(8×6 mm)，以确定三维光学跟踪器的测量精度。对于提出的和传统的印模采集方法，我们比较了牙种植体的位置和方向的复制精度以及获得印模的时间。最后制作了计算机辅助设计(CAD)/计算机辅助制造(CAM)超结构框架，以确定其适配精度。两种方法制作的种植体的测量误差分别为71.31±2.31μm和32±1.18μm。与传统方法相比，建议的方法获得印象所需的时间显著缩短。计算机辅助设计/计算机辅助制造系统的上层建筑框架与4个种植体模拟物之间的连接隆起量分别为55.00±10.10μm、94±2.35 m、2±1.1gμm和66±9.3μm。然后，我们使用牙种植体位置和方向的可重复性测量结果，在可接受的精度范围内制造CAD/CAM上部结构框架。
ObjectivesThe aim of this study was to devise an optical impression method that could make impressions of dental implants accurately and rapidly.Materials and methodsFour paper markers (4 × 3 mm, 8 × 6 mm, 16 × 12 mm, and 24 × 18 mm) and one titanium marker (8 × 6 mm) were prepared to determine the measuring accuracy of the three‐dimensional optical tracker. For a proposed and conventional impression taking method, we compared the reproduction accuracies of the positions and orientations of dental implants and the times to obtain impressions. Finally, we fabricated computer‐aided designing (CAD)/computer‐aided manufacturing (CAM) superstructure frameworks to determine the adaptation accuracy.ResultsThe 8 × 6‐mm titanium marker was optimal among the prepared markers. Dental implants made by the proposed and conventional impression taking methods had measurement errors of 71 ± 31 μm and 32 ± 18 μm, respectively. The proposed method took a significantly shorter time to obtain an impression than did the conventional method. The connection between the CAD/CAM superstructure frameworks and four implant analogs had uplifts of 55 ± 10 μm, 94 ± 35 μm, 2 ± 1 μm, and 66 ± 3 μm.ConclusionOur proposed method and fabricated titanium markers enabled us to measure the positions and orientations of dental implants both accurately and rapidly. We then used the reproducible measurement results for the positions and orientations of the dental implants to fabricate CAD/CAM superstructure frameworks within an acceptable accuracy range.