The rational design, synthesis, and validation of a significantly improved insoluble polymer-supported siloxane-transfer agent has been achieved that permits efficient palladium-catalyzed cross-coupling reactions. The cross-linked polystyrene support facilitates product purification with excellent siloxane recycling. Drawbacks of a previous polymer-supported siloxane-transfer agent, relating to...

This study was designed to compare the retention strength of monolithic CAD/CAM PEEK crowns that YTZP-zirconia crowns, both resin-cemented epoxy resin dies resembling lower molar teeth; after thermomechanical aging simulating 3 months in-vivo service. Materials and methods: 22 identical dies, preparation a second (4mm height, 6° axial convergence 1 mm-thick deep chamfer finish line), were produ...

Oxygen plasma treatment has been used extensively to bond polydimethyl siloxane to polydimethyl siloxane or glass in the rapid prototyping of microfluidic devices. This study aimed to improve the bonding quality of polydimethyl siloxane to passivated silicon using oxygen plasma treatment, and also to evaluate the bonding quality. Four types of passivated silicon were used: phosphosilicate glass...

As people in the 21st century become increasingly environmentally aware, environmentally friendly products have come into focus. As such, environmentally friendly textiles and eco-textiles have become an international trend in research and development. Poly(lactic acid) fiber, which is biodegradable, holds much promise, but it is difficult to deep dye. This study used chitosan, succine anhydrid...

BACKGROUND Evaluation of the marginal fit of cemented zirconia copings manufactured after digital impression with Lava™ Chairside Oral Scanner in comparison to that of zirconia copings manufactured after conventional impressions with polyvinyl siloxane. METHODS A prepared typodont tooth #36, was replicated 40 times with a vinyl silicone and precise model resin. The dies were randomly divided ...

OBJECTIVES The objectives of this study were to synthesize two new siloxane-methacrylate (SM) monomers for application in dentin adhesives and to investigate the influence of different functionality of the siloxane-containing monomers on the adhesive photopolymerization, water sorption, and mechanical properties. METHODS Two siloxane-methacrylate monomers (SM1 and SM2) with four and eight met...

Material properties of siloxanes are governed by the inherently low basicity of the siloxane linkage Si-O-Si and thus its inability to form hydrogen bonds with polar molecules like water. Due to the importance of the linkage in minerals (e.g. quartz, feldspars) and polymers (e.g. silicones), it is a point of major interest to find ways to tune the properties of the siloxane linkage to develop n...