AI Article Synopsis
Article Abstract
The objective of this study was to investigate the rebonding effect of a new silane coupling agent on various ceramic brackets bonded to ceramic specimen. Different ceramic brackets (Fascination 2, Clarity SL, and In-OvationC) were assigned to three groups: rebonding with new silane coupling agent, rebonding with conventional silane coupling agent, or regular bonding as control (n = 16). Bracket adhesion was calculated with a shear test in a universal testing machine. The bracket-composite-ceramic interface was evaluated using the adhesive remnant index score. One-way analysis of variance was applied for inferential statistics. Rebonding with the new silane coupling agent resulted in high shear bond strengths (SBSs; mean values: 37.44-41.24 MPa) and ceramic specimen fractures. Rebonding with the conventional silane coupling agent resulted in significantly (P < 0.001) lower clinically adequate SBS (mean values: 20.20-29.92 MPa) with the least ceramic specimen fractures. Regularly bonded ceramic brackets resulted in clinically adequate to high SBS (mean values: 17.06-41.56 MPa) depending on their bracket base design. Rebonded ceramic brackets showed sufficient SBS to ceramic specimen surfaces. However, increased bracket adhesion was associated with a risk of ceramic specimen surface damage. Therefore, ceramic brackets rebonded with the new silane coupling should be debonded cautiously using alternative debonding methods.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/ejo/cjr090 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pd(0)/Pd(II) Electromerism Triggered by Lewis Base Coordination to a Redox-Active Silicon Z-Type Ligand.
Angew Chem Int Ed Engl
December 2024
Universität Heidelberg: Universitat Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120, Heidelberg, GERMANY.
Electromerism (aka. valence tautomerism) corresponds to the switching of electronic distributions between redox-active ligands and central elements. While this phenomenon is well established for several transition metals, the Pd(0)/Pd(II) couple could not yet be involved due to the high energy of the Pd(0) state.
View Article and Find Full Text PDFCross-Dehydrogenative Coupling of Secondary Amines with Silanes Catalyzed by Agostic Iridium-NSi Species.
Inorg Chem
December 2024
Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Facultad de Ciencias, Universidad de Zaragoza - CSIC, 50009 Zaragoza, Spain.
An active catalytic system for the cross-dehydrogenative coupling (CDC) of a wide range of secondary amines with silanes is reported. The iridium(III) derivatives [Ir(H)(X)(κ-NSi)(L)] (NSi = {4,8-dimethylquinoline-2-yloxy}dimethylsilyl; L = coe, X = Cl, ; L = coe, X = OTf, ; L = PCy, X = Cl, ; L = PCy X = OTf, ), which are stabilized by a weak yet noticeable Ir···H-C agostic interaction between the iridium and one of the C-H bonds of the 8-Me substituent of the NSi ligand, have been prepared and fully characterized. These species have proven to be effective catalysts for the CDC of secondary amines with hydrosilanes.
View Article and Find Full Text PDFOrgano-photocatalytic dearomative hydrosilylation of indoles with silanes.
Org Biomol Chem
December 2024
College of New Energy, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China) 266580, Qingdao, P. R. China.
A photocatalytic dearomative hydrosilylation reaction of indole derivatives with silanes has been accomplished for the synthesis of valuable indolinyl silanes through a carbon-silyl radical coupling process with the cooperation of photoredox and hydrogen atom transfer catalytic systems composed of 3DPA2FBN (2,4,6-tris(diphenylamino)-3,5-difluorobenzonitrile), (i-Pr)SiSH, and base additives. This protocol is featured by a broad substrate scope, transition metal-free conditions, high diastereoselectivities and applications in natural product derivatives.
View Article and Find Full Text PDFFundamental Insights into Copper-Epoxy Interfaces for High-Frequency Chip-to-Chip Interconnects.
ACS Appl Mater Interfaces
December 2024
Gordon A. and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Future processes and materials are needed to enable multichip packages with chip-to-chip (C2C) data rates of 50 GB/s or higher. This presents a fundamental challenge because of the skin effect, which exacerbates signal transmission losses at high frequencies. Our results indicate that smooth copper interconnects with relatively thin cuprous oxides (CuO, Cu) and amine-functional silane adhesion promoters improve interfacial adhesion with epoxy dielectrics by nearly an order of magnitude.
View Article and Find Full Text PDFDegradable chiral mesoporous silica nanoparticles and carboxymethyl chitosan/cystamine hydrogels for selective loading and controlled release of S-naproxen.
Int J Biol Macromol
December 2024
Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China. Electronic address:
Degradable chiral mesoporous silica nanoparticles (DCMSN) are synthesized for selective loading and controlled release of S-naproxen (S-NPX). Chiral silane coupling agent (APTES-L) and degradable silane coupling agent (APTES-CN) are synthesized, respectively, which are used for the synthesis of DCMSN. APTES-L endows the DCMSN with chirality, while APTES-CN endows the DCMSN with degradability.
View Article and Find Full Text PDFWant 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!