We aimed to evaluate the color stability of bulk-fill and conventional composite resin with respect thickness storage media. Twenty specimens a (6 mm diameter 2 thick) 40 Tetric EvoCeram at two different thicknesses thick or 4 thick,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn fontstyle="italic">20</mml:mn></mml:math>) were prepared. The stored in distilled water during study period (28 d). Half remained other half immersed...

Several new bioactive compounds were recently introduced to the market with favorable ion release, tooth remineralization, and alkalizing potential. This study sought compare phosphate release potential of three materials in comparison composite resin. Thirty-six discs (2 × 6 mm) fabricated from Fuji II LC resin modified glass ionomer (RMGI), Activa BioActive, Cention N, Z250 plastic molds. The specimens stored distilled water for 24 48 h months. Half used assess while other half 1 after pH...

Background: This study compared the opinion of dental clinicians and patients regarding appearance need for cosmetic procedures. information can serve as a basis efficient treatment planning. Methods: cross-sectional was conducted on 200 patients, 5 general dentists, restorative dentists. A standardized questionnaire with 17 questions used to collect about their anterior teeth Tooth shade, overjet, overbite were also recorded, three photographs obtained from assessed by clinicians. Data...

This in vitro study assessed the effects of bonding application time (immediate vs. 24-hour delay) and strategy [self-etch (SE) etch-and-rinse (ER)] on cytotoxicity three calcium silicate-based cements [calcium-enriched mixture (CEM) cement, ProRoot mineral trioxide aggregate (MTA) Biodentine] at 1mm 2mm thicknesses. Specimens (n=20 per group) were fabricated using CEM, MTA, Biodentine. Scotchbond Universal was applied immediately or after 24 hours via SE ER strategies. Cytotoxicity cement...

<b>Aim:</b> The aim of this study is to investigate the physical properties conventional and resin-modified glass ionomer cements (GICs) compared GICs supplemented with zinc oxide (ZnO) nanofiller particles at 5% (w/w).<br><b>Methods:</b> In <i>in vitro</i> study, ZnO nanoparticles different morphologies (nanospherical, nanorod, nanoflower) were incorporated powder. samples subjected flexural strength (<i>n</i> = 20) surface hardness test 12) using a universal testing machine Vickers...

Background. Zirconia, with its excellent mechanical properties, has become a popular choice for esthetic and durable restorations due to the increasing demand of patients. It overcome most limitations all ceramic restorations. However, bonding zirconia remains challenge. Objectives. This study is aimed at assessing effect surface treatment alkaline agents two different temperatures on microshear bond strength (μSBS) composite resin. Materials Methods. in vitro, experimental was conducted...

Introduction: It has been suggested that the application of casein phosphopeptide-amorphous calcium phosphate paste (CPP-ACP) and CO2 laser irradiation on enamel could increase resistance to caries acid attacks. The aim current study was compare influence CPP-ACP microhardness demineralized enamel.Methods: Thirty sound maxillary extracted premolars were selected. crowns cut at cervical line split into facial palatal halves. Specimens mounted in self-cure acrylic blocks such way surface...

This study assessed the effect of addition aqueous extract propolis in different concentrations on mechanical and antimicrobial properties resin-modified glass ionomer cement (RMGIC). In this vitro study, powder Fuji II LC RMGIC was mixed with 25% 50% extracts propolis. Samples (n = 15 for shear bond strength, n 5 flexural 20 antibacterial activity test) were fabricated using mixture. The buccal lingual surfaces 23 premolars ground to expose dentin. Tygon tubes filled cement, bonded dentin,...

This study investigated the indirect effect of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA), as 2 calcium silicate-based hydraulic cements, on human dental pulp stem cells (hDPSCs) through different dentin thicknesses.Two-chamber setups were designed to simulate capping (IPC). Human molars sectioned obtain 0.1-, 0.3-, 0.5-mm-thick discs, which placed between chambers an IPC procedure. Then, MTA CEM applied one side while hDPSCs cultured other side. After weeks...

This study aimed to evaluate the ability of lithium disilicate ceramics reproduce A2 shade and mask A4 substrates.Twenty-four discs (8 mm in diameter, A2) high translucency (groups 1-3) low 4-6) IPS e.max ceramic with different thicknesses (0.5, 0.75, 1 mm) were fabricated as monolithic structures. In addition, medium opacity (group 7-8) core/veneer combinations (0.3 mm/0.7 0.5 mm/0.5 bilayer Specimens superimposed on an substrate (complex). The color changes complex measured using a...

Different thicknesses of restorative material can alter the stress distribution pattern in remaining tooth structure. The assumption is that a thicker composite restoration will induce higher fracture resistance. Therefore, present study evaluated effect thickness on restored premolar with cusp reduction.A 3D solid model maxillary second was prepared and meshed. MOD cavities were designed different reduction (0, 0.5, 1, 1.5, 2.5 mm). Cavities Valux Plus composite. They loaded 200 N force...

Objectives: This study assessed the effect of water storage on flexural strength (FS) low shrinkage composites.Materials and Methods: A total 165 bar-shaped specimens (2 × 2 25 mm) were fabricated composites (Filtek P90 [3M ESPE], GC Kalore [GC International]) a conventional methacrylate-based composite Z250 ESPE]).The subjected to 3-point bending test at 6 time intervals, namely: immediately after curing, 24 hours, 1 week, month, months, year following in wet dry conditions.The FS measured...

This study investigated the microhardness, flexural strength, and color stability of bleach-shade resin composites cured with 3 different light-curing units.In this in vitro experimental study, 270 samples were fabricated bleach A2 shades commercial (Point 4, G-aenial Anterior, Estelite Sigma Quick). Samples (n = 5 for each trial) Bluephase N, Woodpecker LED.D, Optilux 501 units underwent Vickers microhardness strength tests. The tested after 24 hours storage distilled water. Color was...

Background: Despite improvements in the optical properties of composite resins, their color stability is still a matter discussion. This study sought to assess effect light intensity and curing time by light-emitting diode (LED) light-curing unit on methacrylate-based resin. Methods: In this vitro study, 60 discs (8 × 2 mm) were fabricated A2 shade Z250 composite. Specimens polished divided into 4 groups (n=15) for 20 or 40 seconds with 600 1200 mW/cm2 . After immersion distilled water at...

Abstract Aim The aim of the present study was to evaluate micro‐shear bond strength silorane‐based composites after saliva/blood decontamination. Methods A transparent mold (1 × 2 1 cm) used make 11 flat, composite blocks. One block served as control. After contamination, blocks were treated follows: group 1: 10‐s air spray; 2: water spray + 3: etching with phosphoric acid; 4: bonding; 5: and groups 6–10: same 1–5, only difference being that blood instead saliva. Ten tubes (0.7 mm mm)...

Objectives: Microleakage is the main concern in composite restorations. This study aimed to compare microleakage of two bulk-fill and one conventional at different time points.Methods: Class II cavities were prepared 60 premolar teeth divided into six groups 20. Groups 1 4 incrementally filled with Grandio composite. 2 5 X-tra fil 3 6 Tetric-N-Ceram layer. The samples thermocycled for 5000 cycles between 25-55°C. In 1-3, incubated 24 hours then immersed 1% methylene blue dye. 4-6 three...

Objectives: Ceramics have advantages such as optimal esthetics and biocompatibility. However, in the oral environment, they are subjected to high levels of stress due masticatory forces, saliva, thermal changes alterations pH, which increase their risk fracture. Since replacement these restorations is costly time-consuming, composite resin often used for intraoral repair restorations. This study aimed assess shear bond strength two porcelain systems by Pulpdent Ultradent evaluate effect...

This study assessed the effect of storage time on chemical structure a single-bottle and two-bottle experimental ceramic primer micro-shear bond strength (µSBS) composite to ceramic.

One of the most important factors in clinical longevity composite resin restorations is proper adhesion, which achieved using phosphoric acid. Different acid products might affect micro-shear bond strength to enamel.