Zhang Chengyu, Yuan Yanping, Chen Jimin
Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China.
Beijing International Science and Technology Cooperation Base of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China.
Materials (Basel). 2022 Feb 25;15(5):1738. doi: 10.3390/ma15051738.
An implant template with great precision is significantly critical for clinical application. Currently, the application of an immediate implant remains limited by the deviations between the planned and actual achieved positions and long periods required for preparation of implant templates. Material Extrusion (MEX), as one kind of 3D printing method, is well known for its low cost and easy operation. However, the accuracy of the implant template printed by MEX has not been fully researched. To investigate the accuracy and feasibility of in vitro computer-guided surgery assisted with a MEX printed template, unidentified plaster samples missing a maxillary molar are digitalized. Mimics software (Materialise, Leuven, Belgium) is used for preoperative design. Surgical templates are fabricated by a MEX 3D printer (Lingtong III, Beijing SHINO, Beijing, China). Postoperative CBCT data are obtained after surgical template placement. The differences in positions of X, Y, Z, and dXYZ as well as angulations between the placed and the designed template are measured on labiolingual and mesiodistal planes. The deviations of the planned and the actual outcome in each dimension are observed and analyzed. Data from different samples indicate that the mean deviation of the angle measures approximately 3.640°. For position deviation, the maximum deviation is found in the z-direction and the mean deviation is about 0.365 ± 0.136 mm. The mean deviation of space Euclidean distance dXYZ is approximately 0.537 ± 0.123 mm. Implant templates fabricated by MEX present a relatively high accuracy for tooth-supported guide implantation.
具有高精度的种植体模板对于临床应用至关重要。目前，即刻种植的应用仍受限于计划位置与实际到达位置之间的偏差以及种植体模板制备所需的较长时间。材料挤出（MEX）作为一种3D打印方法，以其低成本和易操作而闻名。然而，通过MEX打印的种植体模板的准确性尚未得到充分研究。为了研究体外计算机引导手术辅助MEX打印模板的准确性和可行性，对上颌磨牙缺失的未识别石膏样本进行数字化处理。使用Mimics软件（Materialise，比利时鲁汶）进行术前设计。手术模板由MEX 3D打印机（灵通III，北京创鑫，中国北京）制造。在放置手术模板后获取术后CBCT数据。在唇舌侧和近远中平面上测量放置的模板与设计模板之间在X、Y、Z位置以及dXYZ的差异以及角度。观察并分析每个维度上计划结果与实际结果的偏差。来自不同样本的数据表明，角度的平均偏差约为3.640°。对于位置偏差，最大偏差出现在z方向，平均偏差约为0.365±0.136毫米。空间欧几里得距离dXYZ的平均偏差约为0.537±0.123毫米。通过MEX制造的种植体模板在牙支持式引导种植方面具有较高的准确性。
