Doctoral student, Clinic of Prosthodontics, Centre of Dental Specialist Care, Lund, Sweden; Department of Prosthodontics, Faculty of Odontology, University of Malmö, Malmö, Sweden.
Assistant Professor, Department of Prosthodontics, Faculty of Odontology, University of Malmö, Malmö, Sweden.
J Prosthet Dent. 2019 Mar;121(3):498-503. doi: 10.1016/j.prosdent.2018.08.009. Epub 2018 Nov 12.
Different factors influence the degree of deviation in dental implant position after computed tomography-guided surgery. The surgical guide-manufacturing process with desktop 3D printers is such a factor, but its accuracy has not been fully evaluated.
The purpose of this in vitro study was to evaluate the deviation in final dental implant position after the use of surgical guides fabricated from 2 different desktop 3D printers using a digital workflow.
Twenty 3D-printed resin models were prepared with missing maxillary premolar. After preoperative planning, 10 surgical guides were produced with a stereolithography printer and 10 with a digital light-processing (DLP) printer. A guided surgery was performed; 20 dental implants (3.8×12 mm) were installed, and a digital scan of the dental implants was made. Deviations between the planned and final position of the dental implants were evaluated for both the groups.
A statistically significant difference between stereolithography and DLP were found for deviation at entry point (P=.023) and the vertical implant position (P=.009). Overall lower deviations were found for the guides from the DLP printer, with the exception of deviation in horizontal implant position.
The tested desktop 3D printers were able to produce surgical guides with similar deviations with regard to the final dental implant position, but the DLP printer proved more accurate concerning deviations at entry point and vertical implant position.
不同因素会影响计算机断层扫描引导手术后牙科种植体位置的偏差程度。手术导板制造过程中使用桌面 3D 打印机就是一个这样的因素，但它的准确性尚未得到充分评估。
本体外研究的目的是评估使用数字工作流程制造的来自 2 种不同桌面 3D 打印机的手术导板后最终牙科种植体位置的偏差。
使用缺失上颌前磨牙准备 20 个 3D 打印树脂模型。在术前规划后，使用立体光固化（SLA）打印机和数字光处理（DLP）打印机各生产 10 个手术导板。进行引导式手术；安装 20 颗（3.8×12mm）牙科种植体，并对牙科种植体进行数字扫描。评估两组牙科种植体的计划位置和最终位置之间的偏差。
SLA 和 DLP 之间在入口点（P=.023）和垂直种植体位置（P=.009）的偏差方面存在统计学显著差异。DLP 打印机生产的导板总体偏差较小，但水平种植体位置除外。
所测试的桌面 3D 打印机能够以类似的最终牙科种植体位置产生手术导板，但在入口点和垂直种植体位置的偏差方面，DLP 打印机更准确。
