一种通用粘合剂的纵向粘合强度和不同酸蚀刻协议下的化学牙特征
Lucélia Lemes Gonçalves1, Anuradha Prakki2, Tânia Mara da Silva1
1Universidade Estadual Paulista (UNESP), Instituto de Ciência e Tecnologia da UNESP, Departamento de Odontologia Restauradora, São José dos Campos, Brasil.
Journal of applied oral science : revista FOB
|March 27, 2024
概括
对牙而言,聚烯酸 (PAA) 蚀刻不如酸 (PA) 激进,但对通用粘合剂而言,自蚀刻仍然是最佳的. 这项研究用不同的蚀刻协议评估了结合强度和牙特性.
科学领域:
- 生物材料科学 生物材料科学
- 牙科材料科学 牙科材料科学
- 粘合式牙科 粘合式牙科
背景情况:
- 通用粘合剂在牙科修复中提供了多功能性.
- 丁丁蚀刻协议显著影响粘合剂粘合强度和寿命.
- 了解蚀刻剂和牙之间的化学和物理相互作用对于可预测的临床结果至关重要.
研究的目的:
- 用不同的牙蚀刻协议来评估通用粘合系统的纵向粘合强度.
- 用聚烯酸 (PAA) 和酸 (PA) 蚀刻后,对牙基材进行化学表征.
- 为了评估粘合剂接口随着时间的推移的退化.
主要方法:
- 丹丁样本用PAA (25%) 或PA (32%) 蚀刻,并使用富里埃变换红外光谱法 - 减弱总反射率 (FTIR-ATR) 进行分析.
- 通过溶解的交联端 (ICTPtp,CTXtp) 和最终抗拉强度 (UTS) 来评估原蛋白降解.
- 微拉力键强度 (μTBS),扫描电子显微镜 (SEM) 和纳米泄漏在基线和1年后对PAA,PA和自我蚀刻 (SE) 组进行了评估.
主要成果:
- 与PA相比,FTIR分析显示PAA与PA相比,对酸盐组的减少较少.
- 聚氨酸蚀刻导致更高的ICTPtp值和更低的UTS,表明更大的原降解.
- μTBS受到储存时间的显著影响,但不是蚀刻协议;SEM显示1年后PA的最小降解. 在SE集团没有显著的纳米泄漏.
结论:
- 与酸 (PA) 相比,聚烯酸 (PAA) 是一种不那么激进的牙蚀刻方法,当与通用粘合剂一起使用时,它与酸 (PA) 相比.
- 尽管最初的基质相互作用有差异,但这些蚀刻协议并没有显著影响长期键强度.
- 自蚀刻 (SE) 仍然是含有功能单体的通用粘合剂系统的首选策略,确保最佳的接口完整性.
更多相关视频
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
375
16:30Application of Light-cured Dental Adhesive Resin for Mounting Electrodes or Microdialysis Probes in Chronic Experiments
Published on: July 30, 2007
15.4K
相关概念视频
01:12Bonding and Strength of Aggregate
152
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...
152
03:05Acid Strength and Molecular Structure
30.9K
Binary Acids and Bases
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with...
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with...
30.9K
02:40Chemical Bonds
16.5K
Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons...
16.5K
01:22EDTA: Chemistry and Properties
1.9K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.9K
02:49Bond Energies and Bond Lengths
25.2K
Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.
25.2K
00:26Hydrogen Bonds
121.2K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
121.2K