PDF(Pubmed)
Abstract：
The aim of the study was to evaluate the accuracy of zygomatic implant placement using customized bone-supported laser-sintered titanium templates. Pre-surgical computed tomography (CT) scans allowed to develop the ideal virtual planning for each patient. Direct metal laser-sintering was used to create the surgical guides for the implant placement. Post-operative CT scans were taken 6 months after surgery to assess any differences between the planned and placed zygomatic implants. Qualitative and quantitative three-dimensional analyses were performed with the software Slicer3D, recording linear and angular displacements after the surface registration of the planned and placed models of each implant. A total of 59 zygomatic implants were analyzed. Apical displacement showed a mean movement of 0.57 ± 0.49 mm on the X-axis, 1.1 ± 0.6 mm on the Y-axis, and 1.15 ± 0.69 mm on the Z-axis for the anterior implant, with a linear displacement of 0.51 ± 0.51 mm on the X-axis, 1.48 ± 0.9 mm on the Y-axis, and 1.34 ± 0.9 mm on the Z-axis for the posterior implant. The basal displacement showed a mean movement of 0.33 ± 0.25 mm on the X-axis, 0.66 ± 0.47 mm on the Y-axis, and 0.58 ± 0.4 mm on the Z-axis for the anterior implant, with a linear displacement of 0.39 ± 0.43 mm on the X-axis, 0.42 ± 0.35 mm on the Y-axis, and 0.66 ± 0.4 mm on the Z-axis for the posterior implant. The angular displacements recorded significative differences between the anterior implants (yaw: 0.56 ± 0.46°; pitch: 0.52 ± 0.45°; roll: 0.57 ± 0.44°) and posterior implants (yaw: 1.3 ± 0.8°; pitch: 1.3 ± 0.78°; roll: 1.28 ± 1.1°) (p < 0.05). Fully guided surgery showed good accuracy for zygomatic implant placement and it should be considered in the decision-making process.
摘要：
该研究的目的是评估使用定制的骨支撑激光烧结钛模板放置zy骨植入物的准确性。术前计算机断层扫描（CT）扫描可以为每位患者制定理想的虚拟计划。使用直接金属激光烧结来创建用于植入物放置的手术引导件。术后6个月进行术后CT扫描，以评估计划和放置的zy骨植入物之间的任何差异。使用Slicer3D软件进行定性和定量三维分析，记录每个植入物的计划和放置模型的表面配准后的线性和角位移。总共分析了59个颧骨植入物。根尖位移在X轴上显示出0.57±0.49mm的平均移动，在Y轴上为1.1±0.6mm，前植入物在Z轴上为1.15±0.69mm，X轴上的线性位移为0.51±0.51mm，Y轴上1.48±0.9mm,和1.34±0.9mm在Z轴上的后部植入物。基底位移在X轴上显示出0.33±0.25mm的平均运动，Y轴上的0.66±0.47mm,前植入物在Z轴上为0.58±0.4mm，X轴上的线性位移为0.39±0.43mm，Y轴上0.42±0.35mm,后部植入物在Z轴上为0.66±0.4mm。角位移记录了前部植入物（偏航：0.56±0.46°；俯仰：0.52±0.45°；滚动：0.57±0.44°）和后部植入物（偏航：1.3±0.8°；俯仰：1.3±0.78°；滚动：1.28±1.1°）之间的显着差异（p<0.05）。完全引导的手术对the骨植入物的放置显示出良好的准确性，应在决策过程中予以考虑。
