期刊
DENTAL MATERIALS
卷 37, 期 5, 页码 E314-E327出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2021.01.016
关键词
Vat photopolymerization; Stereolithography; Methacrylate; Flexural strength; Cytotoxicity; 3D printing; Additive manufacturing
资金
- China Scholarship Council (CSC) [201606240087, 201608440274]
The study found that extending the post-rinsing time did not improve the cytocompatibility of SLA-printed orthodontic splint material, and may result in a decrease in flexural strength.
Objective. Since the post-rinsing time is inconsistently recommended, this study aims to investigate the effect of post-rinsing time on the flexural strength and cytotoxicity of an stereolithographically (SLA) printed orthodontic splint material. Methods. SLA-printed specimens were ultrasonically rinsed with isopropanol (IPA) for 5 min, 12 min, 20 min, 30 min, 1 h, and 12 h, respectively. Surface characterization was conducted by scanning electron microscopy and roughness measurements. Flexural strength was evaluated using a three-point bending test. Cytotoxicity was determined by direct contact test and extract test. For both tests, cell viability (live/dead staining) and cell metabolic activity (CCK-8 assay) were evaluated. Additionally, water sorption and water solubility were tested to analyze the mass loss from immersion. Results. No apparent surface alterations could be detected on the samples post-rinsed for less than 1 h. In contrast, when the post-rinsing time was prolonged to 12 h, surface fissures could be observed. Flexural strength linearly decreased with increasing post-rinsing time. All post-processed specimens did not show an obvious cytotoxic effect. Significance. The removal of cytotoxic methacrylate monomers by post-rinsing with IPA could be achieved in 5 min. Extending post-rinsing time could not improve the cytocompatibility of the SLA-printed orthodontic splint material, and may result in a decrease in flexural strength. (c) 2021 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据