Nanostructured materials are advantageous in offering huge surface to volume ratios, favorable transport properties, altered physical properties, and confinement effects resulting from the nanoscale dimensions, and have been extensively studied for energy-related applications such as solar cells, catalysts, thermoelectrics, lithium ion batteries, supercapacitors, and hydrogen storage systems. T...

background numerous factors have an effect on the accuracy of an impression and resultant cast, and these include: impression material, impression technique, tray selection, impression disinfection, storage time of impression before pouring, stone type used for fabrication of cast. up to now, there has been little research conducted on the effect of contact time of a cast with an impression, on...

dontic treatment is compounded by the necessity of utilizing an indirect approach, where fabrication occurs extraorally at the dental laboratory and the completed restorations are subsequently retrofitted in the oral cavity. One fundamental aspect in the fabrication of indirect restorations is the procurement of an accurate impression from which a refractory model can be created to precisely re...

Aims: To investigate the effect of adding nanoparticles on compressive strength alginate impression material. Materials and Methods: In this study, two types were added to materials: silver zirconium oxide at four concentrations: 0.5 %, 1%, 2%, 5% by weight. Compressive was tested for 45 samples made according American Dental specification no.18 Results: The addition did not alter material, whe...

Three-dimensional imaging of dental tissues will have a major impact in dentistry if the images are accurate. The purpose of this study was to measure the accuracy and precision of a system for creating three-dimensional images of dental arches. Using vinyl polysiloxane impression materials and improved dental stone, we made 10 stone casts of a "dental" standard with known dimensions. The impre...

Three-dimensional computer models of dental arches play a significant role in prosthetic dentistry. The microfocus X-ray CT scanner has the advantage of capturing precise 3D shapes of deep fossa, and we propose a new method of measuring the three-dimensional morphology of a dental impression directly, which will eliminate the conversion process to dental casts. Measurement precision and accurac...

The 3-way tray technique is popular as it provides master and opposing arch impressions and an interocclusal record at the same time. Excellent clinical results can be achieved with appropriate case selection, use of rigid tray and impression materials, attention to tray positioning and other details throughout the process, and clear understanding of the limitations of the technique by the oper...

Molding in a fixed prosthesis is one of the most important stages rehabilitative treatment, as it there that attempts are made to reproduce dental preparations and adjoining regions by using appropriate materials techniques. Among molding available on market, elastomers stand out, which polymers where prey occurs through increase chain establishment cross-links. The objective study present clin...