The viscoelastic properties of three commercially available resin-based composites (FiltekTM P60, FiltekTM Supreme, and FiltekTM Z250; 3M ESPE, Bracknell, UK) were measured to determine the effect of beverages on their storage moduli and damping ratios. Rectangular samples of the three hybrid composites were immersed in three beverages at 37 °C for 1, 7, 30, and 60 days. At each time interval, ...

PURPOSE To compare various pre-treatments serving as cleaning procedures of dentin on the bond strength of resin composite promoted by a universal adhesive system applied either in the absence or presence of simulated pulpal pressure. MATERIALS AND METHODS Prior to application of the adhesive system (Scotchbond Universal) and resin composite (Filtek Z250), ground dentin surfaces were given on...

The restoration of class II cavities is predominantly carried out with composite materials. Due to the high failure rate in restoring this type cavity, materials much-improved properties and new application techniques have been promoted. study aimed analyze mechanical behavior several topical (nanocomposites, nanohybrids ormocer) using different techniques. In a lower second molar, occlusal cav...

The aim of this in vitro study is to investigate the effects acidic beverages on discoloration bulk-fill composites with different viscosities. 144 disc-shaped specimens (8mm diameter × 2mm thick) were prepared from four composite resins including a nanohybrid (Filtek Ultimate), two packable Bulk Fill, Tetric N Ceram Fill), and flowable (Tetric Flow Fill). each group divided into 3 subgroups su...

Context:The quality of light curing units can profoundly influence mechanical properties dental composite materials. Aim: To compare effect Woodpecker RTA Mini-S and Elipar Deep Cure-L onmechanical (compressive strength, diametral tensile strength microhardness) Filtek Bulk-Fill. Methods Materials: A total 32 samples Bulk Fill were divided into 2 equal groups (n=16). 12 in each group fabricated...

STATEMENT OF THE PROBLEM Composite bond to dentin is crucial in many clinical conditions particularly in deep cavities without enamel margins due to insufficient penetration of adhesive into demineralized dentin. PURPOSE The aim of this study was to assess the shear bond strength (SBS) of a methacrylate-based and a silorane-based composite resin to surface and deep dentin after pretreatment w...

Abstract Objective The effect of polymerization time and resin shade on the depth cure (DOC) two nano-hybrid composites (Filtek Z250 XT IPS Empress Direct) was evaluated compared. Materials Methods Sixty specimens were prepared from shades (A1 A3) composites. allocated into groups that further divided three subgroups depending (20, 40, 60 sec; n = 5). After that, DOC by calculating polymerized ...