Publications by authors named "Shiva Jafarnia"
Article Synopsis
- * Sixty molars were polished, bonded with universal adhesives, restored with composite resin, and tested for bond strength, with statistical analysis revealing significant differences in adhesive performance.
- * G-Premio Bond and Single Bond demonstrated higher bond strength compared to Clearfil S3 Bond, with adhesive failures being the most common type of failure observed in all groups under microscopic examination.
Background: Resin composites have various applications. At the same time, they have some drawbacks, such as polymerization shrinkage. Conventional composites are polymerized in 2-mm thick layers.
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- - This study evaluates the mechanical and biological properties of bioactive glass (BG) coatings applied to titanium (Ti) to enhance its bioactivity.
- - The BG 58S coating was successfully created using a sol-dip method, showing strong adhesion to the treated Ti substrate with a bonding strength of 41.03±2.31 MPa.
- - The results indicated that the BG coating significantly improved cell viability and alkaline phosphatase activity, suggesting that the sol-dip method can effectively produce a bioactive Ti surface.
Article Synopsis
- - Yttria-doped ZrO coatings were created using an acidic zinc phosphatizing solution followed by hydrothermal treatment, and their properties were studied with techniques like FE-SEM, XRD, EDX, and XPS.
- - The coating showed a strong adhesive strength of 79.11 MPa, and it provided an effective surface for cell attachment and proliferation in vitro, indicated by positive SEM results and MTS assay™.
- - Analysis confirmed that the coating was primarily zinc phosphate (hopeite) and that hydrothermal treatment did not alter the flexural strength of the zirconia substrate.
Purpose: The objective of this study was to evaluate the physical and mechanical properties of a short fiber-reinforced resin composite: everX-Posterior and compare it with two bulk-fill composites, namely, Filtek Bulk-fill and Beautifil-Bulk, which are intended for large posterior restorations.
Methods: Investigated properties were flexural strength, flexural modulus, surface roughness, volumetric shrinkage and depth of cure. Scanning electron microscopy images of each specimen after the flexural test were used for cross-sectional comparison.
Background: Recently, incorporation of nanohydroxyapatite (NHA) has been suggested to improve the mechanical properties of glass ionomers (GIs). This study aimed to assess the effect of addition of NHA on wear of resin modified glass ionomer (RMGI) by tooth brushing simulation.
Material And Methods: In this , experimental study, NHA in 1, 2, 5, 7 and 10wt% concentrations was added to Fuji II LC RMGI powder, and 48 samples (5×5mm) in five experimental and one control group (n=8) were fabricated.