PDF(Pubmed)
Abstract：
Printing orientation is one of the printing parameters that affect the properties of three-dimensional (3D)-printed resins. Different printing orientations and directions have been suggested; however, no clear and specific orientations are recommended in the literature in terms of the printing orientation effect on the accuracy and fit of 3D-printed removable dental prostheses. This review aimed to evaluate the effect of printing orientation on the fit and accuracy of 3D-printed removable dental prostheses. The PubMed, Scopus, and Web of Science databases were searched for published articles that investigated the effect of printing orientations on the accuracy and fit of the 3D-printed denture base. Full-length English published articles were searched between January 2010 and December 2023, which examined topics related to printing orientations, building angles, 3D printing, printing technology, accuracy, dimensional changes, internal fit, marginal integrity, marginal discrepancies, trueness, precision, and adaptation. Of the ten included studies, one investigated maxillary and mandibular denture bases, seven assessed maxillary denture bases, and two evaluated mandibular bases. Different printing orientations, ranging from 0° to 315°, were explored, with a higher prevalence of 0°, 45°, and 90°. The included studies utilized stereolithography and digital light processing printing technologies. High accuracy was observed at 45°, followed by 90. Additional struts and bars on the cameo surface increased the accuracy of the 3D-printed denture base. These results shows that printing orientation has a significant effect on the accuracy of 3D-printed resin, with 45° exhibiting the highest accuracy. In addition to the support structure, the density and position can impact the accuracy.
摘要：
打印取向是影响三维(3D)打印树脂的性质的打印参数之一。已经提出了不同的印刷方向和方向；然而，在3D打印的可移动假牙的准确性和适合性方面,在文献中没有推荐清晰和具体的方向。本文旨在评估打印方向对3D打印可移动假牙的配合和准确性的影响。PubMed,Scopus,在WebofScience数据库中搜索已发表的文章，这些文章研究了打印方向对3D打印义齿基托的准确性和贴合性的影响。在2010年1月至2023年12月之间搜索了完整的英文发表的文章，这些文章研究了与印刷方向有关的主题，建筑角度,3D打印,印刷技术,准确度,尺寸变化，内部配合,边际完整性，边际差异，真实,精度,和适应。在纳入的十项研究中，一个调查了上颌和下颌义齿基托，七个评估的上颌义齿基托，和两个评估的下颌基部。不同的印刷方向，范围从0°到315°，被探索，0°的患病率较高，45°,90°。所包括的研究利用了立体光刻和数字光处理印刷技术。在45°观察到高精度，其次是90。浮雕表面上的额外支柱和杆提高了3D打印义齿基托的准确性。这些结果表明，打印取向对3D打印树脂的精度有显著影响，以45°表现出最高的精度。除了支撑结构，密度和位置会影响精度。
