机器曲的3和6链的twistflex语言固定保持器的可复制性和准确性-一个体外研究
Katharina Klaus1, Jan D Pollmeier2, Sabine Ruf1
1Department of Orthodontics, Justus Liebig University Giessen, Giessen, Germany.
Journal of the World federation of orthodontists
|July 20, 2025
概括
这项研究发现,机器曲的CAD/CAM保持器显示了与设计模型的偏差,下保持器和三链线更精确. 这些精度差异可能具有临床意义.
科学领域:
- ортодонтика和牙科技术 牙科和牙科技术
- 生物材料工程 生物材料工程
背景情况:
- 评估自动化制造过程的精度,对于牙科器械是临床成功的关键.
- 计算机辅助设计/计算机辅助制造 (CAD/CAM) 提供了精确保持器制造的潜力.
研究的目的:
- 在复制CAD/CAM设计的牙科支器时,评估支器曲机器的准确性.
- 为了量化机器曲和主CAD/CAM保持器设计之间的偏差.
主要方法:
- 数字设计的狗狗保持器使用Bender II机器制造了十次,每次使用3或6链的扭曲线.
- 从CAD/CAM坐标创建主保持器,并将曲的保持器数字化并叠加用于偏差分析.
- 偏差以横向,斜向和垂直维度进行测量;统计分析使用混合线性模型.
主要成果:
- 平均偏差为0.22毫米 (横向), -0.01毫米 (斜向) 和0.48毫米 (垂直).
- 在所有尺寸 (P < 0.001) 中,下部保持器比上部保持器要精确得多.
- 三链曲折线的精度明显高于六链线的精度 (P < 0.05).
结论:
- 在CAD/CAM设计和机器曲保持器之间存在临床相关的偏差.
- 精度受部位置和线材类型的影响,对临床应用有影响.
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