Objective: The purpose of this study was to investigate the effects of Erbium-doped: yttrium-aluminum-garnet (Er:YAG) laser pretreatment with different energy levels on the shear bond strength (SBS) of repairing composite materials.
Background Data: After long-term usage of composite resins in the mouth, they can need some repair. Repairing composite bonding so it attaches to the old restoration is important for clinical success.
Methods: Sixty composite resin materials were used in this study. The aging procedure was performed with 6000 thermocycles in water from 5°C to 55°C. Different surface pretreatment methods [control (no surface treatment), sandblasting, laser treatment (energy level 75, 100, 200, and 300 mJ)] were employed, for a total of six groups. Composite resins of the same kind as their substrates were adhered onto the conditioned substrates. The SBS test was used to assess the durability of all groups. Scanning electron microscopy (SEM) analysis was performed on a representative specimen in each group.
Results: Among six surface-treated groups the lowest bond strength was observed in Group C (9.41 MPa) (p<0.001). Group S exhibited the highest bond strength among all groups and showed significant difference from all other groups (33.41 MPa) (p<0.001). In the Er:YAG test groups, bonding values showed varying results from 15.27±0.58 (Group L300) to 25.98±1.08 (Group L75) and showed significant increase when compared with control group (p<0.05).
Conclusions: Altough the sandblasted group exhibited the highest test values, Er:YAG laser treatment on repair composite bonding to old composite may become an alternative to other surface treatment methods.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1089/pho.2014.3859 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exceptionally Strong Triply Dative Be-F Bonds in [CO]BeF and [CO]BeF Complexes: Reducing Valence Shell Electron Repulsion to Achieve High Bond Dissociation Energies.
Inorg Chem
January 2025
Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
Dative bonds are typically polar, weaker, and longer than electron-sharing covalent bonds. The intriguing diatomic BeF anion uniquely exhibits triple Be-F dative bonding with a considerable bond dissociation energy (BDE) of 88 kcal/mol. Here, we report exceptionally strong dative-bonded systems, [CO]BeF and [CO]BeF, with BDE values exceeding 155 kcal/mol by integrating [CO] and [CO] groups into the BeF framework.
View Article and Find Full Text PDFMechanically interlocked two-dimensional polymers.
Science
January 2025
Department of Chemistry, Northwestern University, Evanston, IL, USA.
Mechanical bonds arise between molecules that contain interlocked subunits, such as one macrocycle threaded through another. Within polymers, these linkages will confer distinctive mechanical properties and other emergent behaviors, but polymerizations that form mechanical bonds efficiently and use simple monomeric building blocks are rare. In this work, we introduce a solid-state polymerization in which one monomer infiltrates crystals of another to form a macrocycle and mechanical bond at each repeat unit of a two-dimensional (2D) polymer.
View Article and Find Full Text PDFNanopore Discriminates Watson-Crick and Hoogsteen Hydrogen Bonds in Multiple DNA Contexts.
Nano Lett
January 2025
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
Watson-Crick and Hoogsteen hydrogen bonds aid the formation of highly ordered structures in genomic DNA that dynamically govern genetic modes such as gene regulation and replication. Hence, measuring and distinguishing these two types of hydrogen bonds in different DNA contexts are essential for understanding DNA architectures. However, due to their transient nature and minimal structure differences at the sub-nanometer scale, differentiating Watson-Crick hydrogen bonds from Hoogsteen hydrogen bonds is difficult.
View Article and Find Full Text PDFAcid resistance and bond strength of calcium-containing adhesive on ename.
Int Dent J
January 2025
Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Bunkyo-ku, Tokyo, Japan.
Introduction And Aims: Marginal sealing by enamel bonding is important to enhance the durability of the restoration and prevent secondary caries after operative procedure. This study aimed to evaluate the enamel acid resistance and bond strength of an experimental calcium-containing adhesive system.
Methods: All materials were provided by Kuraray Noritake Dental, Inc.
Impact of surface pre-treatment on bond strength between cement and zirconia: A systematic review and network meta-analysis.
J Prosthet Dent
January 2025
Associate Professor, Department of Prosthodontics, Dental Branch, Islamic Azad University of Medical Sciences, Tehran, Iran.
Statement Of Problem: The optimal zirconia pretreatment, contingent upon the type of cement used, warrants further research.
Purpose: The purpose of this investigation was to evaluate the influence of various surface pretreatments on the bonding efficacy of cement to zirconia.
Material And Methods: A comprehensive search was conducted across the PubMed, Embase, Scopus, and Web of Science databases for in vitro studies related to bonding with zirconia up to April 2024, supplemented by a manual search.
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!