扫描仪
材料科学
复合数
树脂复合材料
数字光处理
塞雷克
3d打印
牙齿修复
成像体模
生物医学工程
复合材料
牙科
陶瓷
核医学
光学
医学
物理
投影机
作者
Nhat Dinh-Minh Nguyen,Nguyen Chi Tran,Trang Tran,Nam Cong-Nhat Huynh,Khoa D. Nguyen,Hung Gia Hoang,Ding Han Wang,Ming-Lun Hsu
出处
期刊:PubMed
日期:2023-09-26
卷期号:26 (3): 201-210
被引量:1
标识
DOI:10.3290/j.ijcd.b3774253
摘要
The accuracy of 3D images produced by an intraoral scanner (IOS) is affected by the optical characteristics of restorative materials such as metal, ceramic, and composite resin. The present in vitro study aimed to investigate the impact of core buildup composite resin translucency on IOS accuracy.A core buildup procedure was performed on a proprietary 3D-printed model using injectable composite resins in four groups with different levels of translucency (highest to lowest: AE, A3, AO3, and EX). Ten experimental scans per group were performed using a Medit i700 IOS on a phantom head-mounted model. Reference scans were obtained using an industrial scanner (Solutionix C500). Values of accuracy (trueness and precision) for the respective groups were evaluated using mean deviation values following 3D superimposition.Composite resin translucency caused the scale reduction of the optical impressions. Values of trueness showed the highest scale reduction in AE, significantly, followed by A3, AO3, and EX. Considering 50 μm as the cut-off value of deviations for clinical acceptability, the analysis showed most deviations in AE and A3. Similar results were found with precision, where AE showed the highest deviation value statistically, followed by A3, AO3, and EX.Composite resin translucency affects the accuracy of optical impressions, causing a fitting error of CAD/CAM prostheses. The more translucent the composite resin, the less accurate the optical impression. This suggests the need for proper compensation during prosthesis designing for an optimal clinical result. In addition, practitioners should indicate in the digital workflow the proper restorative materials regarding not only the mechanical properties and esthetics, but also the optical characteristics.
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