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在不同存储条件下的四个3D打印模型的维度稳定性的体外比较
The Angle orthodontist
|April 19, 2024
概括
评估了3D打印模型的维度稳定性. 所有模型都出现了收缩,白天曝光增加了收缩,这表明需要立即使用正牙器械.
科学领域:
- 牙科材料科学 牙科材料科学
- 添加剂制造 添加剂制造 添加剂制造
- 生物材料是一种生物材料.
背景情况:
- 3D打印越来越多地用于牙矯正,用于家电制造.
- 了解3D打印模型的维度稳定性对于临床准确性至关重要.
- 树脂和聚乳酸 (PLA) 是牙科3D打印的常见材料.
研究的目的:
- 为了评估21周内用树脂和PLA制成的3D打印模型的维度稳定性.
- 为了确定存储条件 (黑暗与日光) 对模型准确性的影响.
- 为了识别具有优越维度稳定的材料,用于正牙应用.
主要方法:
- 用四种材料 (3种树脂,1种PLA) 打印了80个模型.
- 模型在黑暗或白天20°C下存储了21周.
- 用专门的软件,每隔7周测量尺寸变化.
主要成果:
- 所有3D打印模型显示收缩,高达0.26毫米.
- 与黑暗相比,暴露在白天光线下导致的收缩显著更多.
- 整形模型OD01树脂表现出最小的收缩 (0.16毫米),而Draft V2树脂显示出最大的收缩 (0.23毫米).
结论:
- 收缩是3D打印牙模型中常见的问题,无论材料或存储方式如何.
- 长时间储存可能会损害正牙器械的准确性.
- 建议立即使用3D打印的3D打印模型,以确保正确性.
相关概念视频
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Various dissolution methods are utilized to assess a drug’s dissolution rate, including the flow-through cell, paddle-over-disk, cylinder, and reciprocating disk methods.The flow-through cell apparatus (USP (United States Pharmacopeia) method 4) comprises a reservoir for the dissolution medium and a pump that propels the medium through the cell containing the test sample. This method is crucial for assessing modified-release dosage forms with minimally soluble active ingredients, maintaining...

