不同通用粘合剂在人类牙上的微拉伸键强度和故障模式
Flor Santander-Rengifo1, Carmen Martin Carreras-Presas2, Rosa Aroste-Andía3
1Doctoral Program and Health Sciences, Doctoral and Research School, Universidad Europea de Madrid, Madrid, Spain; Academic Program of Dentistry, Universidad Peruana de Ciencias Aplicadas, Lima, Peru.
International dental journal
|May 11, 2024
概括
与Palfique Universal Bond和Single Bond Universal相比,One Coat 7 Universal表现出优越的微拉伸键强度和与牙的化学相互作用. 没有发现与All-Bond Universal相比的显著差异.
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
- 粘合式牙科 粘合式牙科
背景情况:
- 全面粘合系统 (UA) 越来越多地用于修复性牙科.
- 评估它们在牙上的微拉伸键强度 (μTBS) 和失效模式对于临床成功至关重要.
- 牙结构的变化可能会影响它们的性能和与牙基板的相互作用.
研究的目的:
- 为了比较四种通用粘合系统在人类牙上的微拉伸键强度 (μTBS).
- 分析热循环后与每个通用粘合剂系统相关的故障模式.
- 为了确定Palfique Universal Bond,Single Bond Universal,All-Bond Universal和One Coat 7 Universal的比较性能,我们使用了以下三种方法进行比较:
主要方法:
- 准备了人类的第三牙,用四种不同的通用粘合剂系统粘合了牙样本.
- 标本经历了1万个循环的热循环,以模拟口内条件.
- 测试了微拉力键强度 (μTBS),并使用立体显微镜分析了故障模式.
主要成果:
- 一层7环球表现出明显更高的μTBS比Palfique环球债券和单一债券环球.
- 帕尔菲克通用纽带与粘合剂故障有显著的关联,而其他系统显示混合故障.
- 在One Coat 7 Universal和All-Bond Universal之间没有发现μTBS的显著差异.
结论:
- 与Palfique Universal Bond和Single Bond Universal相比,One Coat 7 Universal表现出优越的结合强度和与牙的化学相互作用.
- 选择通用粘合剂系统可以影响牙上的粘合强度和故障模式.
- 进一步的研究可能会探索这些UA的长期临床性能和特定化学相互作用.
相关概念视频
01:12Bonding and Strength of Aggregate
149
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
149
01:16Tensile Strength Considerations of Concrete
126
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen...
The dimensions and shape of a concrete specimen...
126
01:20Microcracking in Concrete
117
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
117
01:17Mortar Properties
122
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
122
01:30Relation Between Tensile Strength and Compressive Strength of Concrete
195
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
195