后聚合方法和不同厚度对用立体石刻 (SLA) 技术生产的假牙基聚合物的颜色稳定性和柔性强度的影响
Esra Kul1, Saba Ostovar2, Seyhan Kahraman2
1Department of Prosthetic Dentistry, Faculty of Dentistry, Ataturk University, Erzurum, Turkey. esra.kul@atauni.edu.tr.
BMC oral health
|April 4, 2025
概括
增加后固化时间和温度,而不是厚度,优化了3D打印假牙基础,以获得更好的屈曲强度和可接受的颜色稳定性. 在2毫米厚度和延长后固化时看到最优的结果.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科材料 牙科材料
背景情况:
- 有限的数据存在于立体石刻 (SLA) 假牙基树脂厚度和后聚合.
- 这项研究解决了对3D打印假牙基的理解这些因素的需要.
研究的目的:
- 评估不同厚度,固化后持续时间和温度对3D打印假牙基的屈曲强度和颜色稳定性的影响.
- 使用SLA确定3D打印假牙基础制造的最佳参数.
主要方法:
- 80个矩形标本 (厚度为2mm和3mm) 使用3D打印的烯酸树脂制造.
- 标本在60°C或80°C下经过15或60分钟的后固化.
- 在37°C的咖啡中浸泡后评估了颜色稳定性;使用通用测试机器测量了曲强度.
主要成果:
- 柔性强度随着更长的固化后时间 (高达60分钟) 和更高的温度 (高达80°C) 增加.
- 厚度为3毫米的样品和最佳的固化后显示出最高的屈曲强度 (高达95MPa).
- 2毫米厚的标本显示出优越的色彩稳定性 (ΔE00 = 2.59) 与可接受的屈曲强度.
结论:
- 更高的固化后温度和持续时间显著提高3D打印假牙基的屈曲强度.
- 增加假牙基厚的效果不如优化后固化以改善机械性能.
- 厚度为2mm,延长后固化,为临床应用提供了柔性强度和颜色稳定性的良好平衡.
相关概念视频
01:14Polymer Classification: Architecture
2.6K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.6K
01:26Polymer Classification: Stereospecificity
2.4K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.4K