一项关于三维直接打印对齐器材料的压力强度的研究,用于清晰对齐器的特定设计
Byeong Gu Bae1, Young Ho Kim1, Gun Ho Lee2
1Department of Orthodontics, Institute of Oral Health Science, Ajou University School of Medicine, Suwon, South Korea.
Scientific reports
|January 20, 2025
概括
三维直接打印对齐器 (3DPA) 与传统的热成型对齐器 (TFA) 相比,具有更高的压力强度. 这种增强的强度表明3D打印透明对齐器在正牙治疗中具有显著的临床潜力.
科学领域:
- 生物材料工程 生物材料工程
- 矯正牙科 矯正牙科是一種矯正牙科.
- 牙科材料科学 牙科材料科学
背景情况:
- 越来越多的人对美学正义牙科治疗的需求有利于清晰的对齐者,而不是传统的固定治疗.
- 透明对齐器提供了一个更美观的替代传统的固定牙科仪器.
- 本研究评估了3D打印对齐器 (3DPA) 与传统热成型对齐器 (TFA) 的压力强度.
研究的目的:
- 为了比较三维直接打印对齐器 (3DPA) 与传统热成型对齐器 (TFA) 的压力强度.
- 根据3DPA的机械性能来确定3DPA的临床适用性.
- 为了评估材料和厚度对对齐器压力的影响.
主要方法:
- 测试了三种类型的对齐器:3DPA材料TC-85 (完整),PETG (控制1),TC-85 (空白,控制2).
- 在对齐器上创建了矩形压力区域 (RPA).
- 压缩周期测试使用电动力学测试机器在不同压缩深度 (100-700微米) 进行了500个周期的压缩周期测试.
主要成果:
- 使用3DPA材料TC-85制造的样本显示压力强度比PETG样本高得多,范围更广.
- 在所有测试组中,TC-85完整样本表现出最高的统计学上显著的压力强度.
- 压力根据材料成分和对齐器厚度而有很大差异.
结论:
- 三维直接打印对齐器技术允许精确修改形状和厚度,用于目标的力应用.
- 3DPA增强了对齐器的生物力学能力,使选择性力量能够实现所需的牙运动.
- 这些发现证明了3D打印对齐器的临床潜力,可能减少对正牙治疗中附件的需求.
相关概念视频
Stress Concentrations
837
Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
837
Stress Concentrations
818
The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress...
The stress...
818
Yield Criteria for Ductile Materials under Plane Stress
839
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
839
Three-Dimensional Analysis of Strain
795
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
795
Stresses under Combined Loadings
606
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
606
Mechanical Characteristics of Steel
942
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
942


