区块间和区块内CAD-CAM复合材料的同质性 机械性能
Maher Eldafrawy1,2, Yousef Karevan1, Jean-François Nguyen3
1Dental Biomaterials Research Unit (d-BRU), Institute of Dentistry, University of Liège (ULiège).
Dental materials journal
|October 19, 2023
概括
CAD-CAM复合材料的机械性能在区块之间和区块内部显示出显著的变化. 这影响了使用这些材料进行的牙科修复的可靠性.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 机械工程 机械工程
背景情况:
- 计算机辅助设计/计算机辅助制造 (CAD-CAM) 复合材料广泛用于牙科修复.
- 确保一致的机械性能对于这些修复的长期成功和耐用性至关重要.
研究的目的:
- 评估五种商业CAD-CAM复合材料的机械性质的区块间和区块内均性.
- 评估曲强度,曲模量,曲负荷能量以及材料块内部和材料块之间的硬度变化.
主要方法:
- 选出了五种CAD-CAM复合材料:Tetric CAD (TET),Katana Avencia (KAT),Cerasmart 270 (CER),Grandio (GRN) 和Vita Enamic (ENA).这些复合材料的使用方法包括:
- 测量了机械性能,包括屈曲强度 (σf),屈曲模量 (Ef),屈曲负荷能量 (Ur) 和硬度 (HV).
- 进行了统计分析,以确定区间和区内同质性.
主要成果:
- 在TET,KAT,CER和ENA中观察到σf,Ef和Ur的区块间同质性的显著差异.
- 在TET,CER和GRN之间,HV的区块间同质性差异很大.
- 在KAT,CER,GRN和ENA中,σf,Ef和Ur的区块内同质性显著不同,而HV在除CER外的所有材料中显示出显著的区块内变化.
- 维布尔模量,表示材料可靠性,是GRN的最高,CER的最低.
结论:
- 商业CAD-CAM复合材料在机械性能方面表现出相当大的变化,无论是在不同块之间还是在单个块内.
- 这种缺乏均性可能会影响从这些材料制造的牙科修复的临床性能和寿命.
- 材料选择应考虑同质性数据,以确保CAD-CAM牙科应用的可预测结果.
更多相关视频
07:09In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
13.4K
11:28A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.5K
相关概念视频
Bending of Members Made of Several Materials
155
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
155
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
273
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
273
Behavior of Concrete Under Compressive Load
183
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
183
Structure of Cadherins
3.4K
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This...
3.4K
