Purpose: To evaluate the retentive strength of a resin cement in combination with a conventional adhesive (Variolink II/Syntac Classic), two resin cements with self-etching adhesives (Panavia F 2.0/ED Primer, Multilink/Multilink Primer A/B), two self-adhering cements (RelyX Unicem Aplicap, Maxcem), and a resin-modified glass-ionomer cement (FujiCem) after cementation of zirconium-oxide ceramic crowns (LAVA) on extracted human teeth.
Methods: 160 extracted teeth (n=20) were prepared in a standardized manner (10 degrees, h=3 mm). The crowns' inner surfaces were air-abraded/sandblasted (Rocatec Pre). Additional pretreatment was carried out with Multilink (metal primer or Monobond S). With RelyX Unicem Aplicap, an additional group that also received Rocatec Plus pretreatment was examined. Immediately after thermocycling (x5000, 5/55 degrees C), 50% of the luted ceramic crowns (n=10) were pulled off along the path of insertion (Zwick 1425); the remaining samples (n = 10) were tested after 1 year of water storage. Statistical analysis was performed using the Wilcoxon Mann-Whitney U-test and Bonferroni adjustment at the 5% level of significance.
Results: The retentive strength values (N/mm2) after 1 year of water storage were (Min/Q1/Median/Q3/Max): Variolink II/Syntac: 1.0/1.9/2.5/3.3/5.2, Panavia F 2.0: 1.5/1.8/2.1/3.6/5,4, Multilink/Metallprimer: 2.9/4.6/5.3/9.4/11,7, Multilink/Monobond S: 4.1/4.8/5.4/7.7/12.6, RelyX Unicem Aplicap: 3.9/6.3/7.5/9.0/10.7, RelyX Unicem Aplicap/Rocatec Plus: 4.4/5.8/7.2/9.4/11.9, Maxcem: 0.9/2.2/3.0/3.3/4.5, FujiCem: 1.6/2.7/4.3/5.4/6.7. RelyX Unicem Aplicap and Multilink showed the highest median retentive strength values. Long-term water storage did not affect the retentive strength.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Hybrid Bilayer Interfaces within Reversed-Phase Chromatographic Silica Formed by Self-Assembly of Long-Chain Primary Alcohols.
Langmuir
January 2025
Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States.
Modification of silica interfaces by covalent attachment of functional ligands is a primary means of controlling the interfacial chemistry of porous silicas used in separations, environmental cleanup, and biosensing. Recently, modification of hydrophobic, -alkyl-silane-functionalized interfaces has been achieved through self-assembly of zwitterionic phospholipids or mixed-charged surfactants to form "hybrid bilayers", producing interfaces that mimic lipid-bilayer partitioning and provide shape-selective partitioning of aromatic hydrocarbons. Charged headgroups, however, introduce electrostatic interactions that strongly influence the retention of ionizable solutes and require careful control over pH and ionic strength in the solution phase.
View Article and Find Full Text PDFComparing field and lab quantitative stable isotope probing for nitrogen assimilation in soil microbes.
Appl Environ Microbiol
January 2025
Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, USA.
Unlabelled: Soil microbial communities play crucial roles in nutrient cycling and can help retain nitrogen in agricultural soils. Quantitative stable isotope probing (qSIP) is a useful method for investigating taxon-specific microbial growth and utilization of specific nutrients, such as nitrogen (N). Typically, qSIP is performed in a highly controlled lab setting, so the field relevance of lab qSIP studies remains unknown.
View Article and Find Full Text PDFA novel levodopa-carbidopa three-layer gastroretentive tablet for improving levodopa pharmacokinetics.
Eur J Pharm Biopharm
January 2025
Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410006, China. Electronic address:
The narrow absorption window of levodopa and the significant impact of peripheral decarboxylase are the most limiting factors in maintaining prolonged and smooth plasma concentration in patients with Parkinson's disease (PD). Therefore, this study aims to design a novel gastroretentive carbidopa-levodopa three-layer tablet, which consists of an expansion layer, an immediate-release layer, and a sustained-release layer. The expansion layer rapidly expanded with sufficient structural strength and stayed in the beagle's stomach for more than 10 h, delineating excellent gastric retention effects.
View Article and Find Full Text PDFDynamic Covalent Sulfur-Selenium Rich Polymers via Inverse Vulcanization for High Refractive Index, High Transmittance, and UV Shielding Materials.
Macromol Rapid Commun
January 2025
College of Chemistry and Chemical Engineering, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Material, Northwest Normal University, Lanzhou, Gansu, 730070, P. R. China.
Recent advancements in inverse vulcanization have led to the development of sulfur-rich polymers with diverse applications. However, progress is constrained by the harsh high-temperature reaction conditions, limited applicability, and the generation of hazardous HS gas. This study presents an induced IV method utilizing selenium octanoic acid, yielding sulfur-selenium rich polymers with full atom economy, even at a low-temperatures of 100-120 °C.
View Article and Find Full Text PDFTailored Polymer-Inorganic Bilayer SEI with Proton Holder Feature for Aqueous Zn Metal Batteries.
Angew Chem Int Ed Engl
January 2025
Harbin Institute of Technology (Shenzhen), Department of Materials Science and Engineering, College Park, Building C, 404, Shenzhen, CHINA.
Conventional SEI in aqueous Zn-ion batteries mainly acts as a physical barrier to prevent HER, which is prone to structural deterioration stemming from uneven Zn deposition at high current densities. Herein, we propose an in-situ structural design of polymer-inorganic bilayer SEI with a proton holder feature by aniline-modulated electrolytes. The inner ZnF2 with high stiffness and strength effectively suppresses Zn dendrites.
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!