The aim of this study was to investigate the effect of silane pretreatment on the universal adhesive bonding between lithium disilicate glass ceramic and composite resin. IPS e.max ceramic blocks etched with hydrofluoric acid were randomly assigned to one of eight groups treated with one of four universal adhesives (two silane-free adhesives and two silane-containing adhesives), each with or without silane pretreatment. Bonded specimens were stored in water for 24 h. The shear bond strength (SBS) of the ceramic-resin interface was measured to evaluate bond strength, and the debonded interface after the SBS test was analysed using field-emission scanning electron microscopy to determine failure mode. Light microscopy was performed to analyse microleakage and marginal sealing ability. Silane pretreatment significantly and positively influenced SBS and marginal sealing ability. For all the universal adhesive groups, SBS increased and the percentage of microleakage decreased after the pretreatment. Without the pretreatment, SBS and the percentage of microleakage were not significantly different between the silane-containing universal adhesive groups and the silane-free groups. Cohesive failure was the main fracture pattern. The results suggest that additional silane pretreatment can effectively improve the bonding strength and marginal sealing of adhesives to lithium disilicate glass ceramics. The bonding performance of silane-containing universal adhesives without pretreatment is similar to that of silane-free adhesives.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/eos.12340 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Protecting monoclonal antibodies via competitive interfacial adsorption of nonionic surfactants.
J Colloid Interface Sci
December 2024
Biological Physics Laboratory, Department of Physics and Astronomy, University of Manchester, Oxford Road, Schuster Building, Manchester M13 9PL, UK. Electronic address:
Hypothesis: Bioengineered monoclonal antibodies (mAbs) have gained significant recognition as medical therapies. However, during processing, storage and use, mAbs are susceptible to interfacial adsorption and desorption, leading to structural deformation and aggregation, and undermining their bioactivity. To suppress antibody surface adsorption, nonionic surfactants are commonly used in formulation.
View Article and Find Full Text PDFInterface Enhancement and Tribological Properties of Cattle Manure-Derived Corn Stalk Fibers for Friction Materials: The Role of Silane Treatment Concentration.
Polymers (Basel)
December 2024
College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
Corn stalk fibers extracted from cattle manure (CSFCM) represent a unique class of natural fibers that undergo biological pre-treatment during ruminant digestion. This study systematically investigates the optimization of CSFCM-reinforced friction materials through controlled silane treatment (2-10 wt.%).
View Article and Find Full Text PDFEnhanced characterization of wheat straw-PLA composites with silane coupling agent and alkali pretreatment.
Ecotoxicol Environ Saf
December 2024
Hebei University of Science and Technology, 050018, China. Electronic address:
Polylactic acid (PLA) composites with high straw content face several challenges, primarily due to the inherent brittleness of straw and its poor compatibility with the polymer matrix. In this study, scanning electron microscopy (SEM) was used to analyze the microscopic structure of wheat straw chemically modified by NaOH and the silane coupling agent, and it was concluded that both treatments effectively removed waxes and silica from the surface of the straw, enhanced fiber roughness, and improved interfacial adhesion. Notably, the silane coupling agent treatment not only facilitated the formation of chemical bonds between the straw fibers and the PLA matrix but also filled the interfiber pores, significantly increasing the structural density.
View Article and Find Full Text PDFInfluence of surface pretreatment using cold-active atmospheric pressure plasma on bond strength of CAD-CAM-fabricated hybrid ceramic crowns: an in-vitro study.
Int J Implant Dent
December 2024
Department for Prosthetic Dentistry and Materials, University Medical Centre, Augustusplatz 2, 55131, Mainz, Germany.
Purpose: This study assesses the impact of Cold Atmospheric Pressure Plasma (CAP) pretreatment on the bond strength of two-piece hybrid ceramic abutment crowns in implant dentistry. The objective is to ascertain whether CAP can be employed as an alternative or complementary technique to conventional methods.
Methods: 80 titanium bases and 80 VITA ENAMIC polymer-infiltrated ceramic network (PICN) crowns were divided into 8 groups (n = 10) based on different surface pretreatments of the crowns before cementation: no treatment (A), hydrofluoric acid (HF) (B), HF and silane (C), silane (D), CAP (AP), HF and CAP (BP), HF, CAP, and silane (CP), and CAP and silane (DP).
Short- and long-term pathologic responses to quartz are induced by nearly free silanols formed during crystal fracturing.
Part Fibre Toxicol
December 2024
Louvain Centre for Toxicology and Applied Pharmacology (LTAP), Institute of Experimental and Clinical Research (IREC), Université catholique de Louvain (UCLouvain), Brussels, Belgium.
Article Synopsis
- - The inhalation of respirable crystalline silica, particularly quartz, is linked to serious health issues like lung inflammation, fibrosis, cancer, and autoimmune diseases, with nearly free silanols (NFS) from fractured quartz being key players in this toxicity.
- - Experiments on mice showed that exposure to NFS-rich quartz caused significant acute and long-term inflammatory responses, fibrosis, cancer, and autoimmune signs, while NFS-poor quartz showed no such effects.
- - The study highlights that NFS-rich quartz specifically triggers harmful biological responses, including increased pro-inflammatory cytokines, lung fibrosis markers, tumors, and autoantibodies, underscoring its health risks compared to less reactive quartz forms.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!