Department of Oral Surgery, Saint Joseph University of Beirut, Beirut, Lebanon.
Faculty of dental medicine, Campus of Medical Sciences, Saint Joseph University of Beirut, Damascus Road, Beirut, 1104 2020, Lebanon.
Int J Implant Dent. 2024 Jul 16;10(1):36. doi: 10.1186/s40729-024-00552-z.
This study aims to evaluate the amount of distortion using computer-guided implant surgery with 3D printed surgical guides in limited edentulous spaces.
25 bone level self-tapping implants (Straumann® BL and BLT) were randomly inserted in either distal or intercalary posterior mandibular edentulism using a fully digital protocol and 3D printed surgical guides. Amount of inaccuracy was evaluated after superimposing the 3 coordinates of virtually planned and final implant images, which were obtained using intra-oral scans and scan bodies. Four evaluation parameters were considered: origo-displacement, error depth, apical displacement and angle between the planned and the placed implant.
The average of distortion was 0.71 mm for the origo-displacement, 0.36 mm for the error depth, 0.52 mm for the horizontal displacement and 3.34º for the error angle.
The major reason of exclusion was CBCT artifacts. Results of this study were aligned with the results of previous studies concerning partially edentulous spaces. CAD/CAM manufacturing process did not result in significant distortion whilst the biggest part of distortions originated from the surgical process. The learning curve in computer-guided implant surgery presented an important source of inaccuracy.
本研究旨在评估在有限的无牙颌空间中使用计算机引导的种植手术和 3D 打印手术导板的失真量。
使用完全数字化的方案和 3D 打印手术导板，将 25 个骨水平自攻种植体（Straumann® BL 和 BLT）随机插入下颌后牙区远中端或中间缺失部位。通过对口腔内扫描和扫描体获得的虚拟计划和最终种植体图像的 3 个坐标进行叠加，评估不准确的程度。考虑了 4 个评估参数：原点位移、误差深度、根尖位移和计划种植体与放置种植体之间的角度。
原点位移的平均失真度为 0.71mm，误差深度为 0.36mm，水平位移为 0.52mm，误差角度为 3.34°。
主要的排除原因是 CBCT 伪影。本研究的结果与以前关于部分无牙颌空间的研究结果一致。CAD/CAM 制造过程没有导致明显的失真，而大部分失真源于手术过程。计算机引导种植手术的学习曲线是造成不准确的一个重要原因。
