This in vivo experimental study evaluated the efficacy of fluoride-releasing elastomers in the control of Streptococcus mutans levels in the oral cavity. Forty orthodontic patients were recruited and divided into two groups of 20. Fluoride-releasing elastomeric ligature ties (Fluor-I-Ties, Ortho Arch Co. Inc., USA) were used in the experimental group, and conventional elastomeric ligature ties ...

Objectives: To compare the force decay rate of the four brands of elastomeric chain over time and finally establish a gradation of brands in terms of force degradation characteristics. Materials and Methods: In this study total of two hundred and forty elastics were used. It had elastics of the same size from four different manufacturers. The experiment was carried out in vivo. For each patient...

BACKGROUND This study was carried out to evaluate the effect of two commercially available chemical disinfectants namely sodium hypochlorite and glutaraldehyde and a surface wetting agent on the wettability of three high precision elastomeric impression materials, addition silicone, condensation silicone and polyether. MATERIALS AND METHODS Three different types of elastomeric impression mate...

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 5541 wileyonlinelibrary.com structures with homogeneous composition, but less effi cient at generating hollow, 3D structures, especially when they comprise multiple materials with different mechanical or physical properties. To fabricate 3D structures that incorporate elastomeric, infl atable components for use in the actuation of soft robots an...

It is proposed to use elastomeric composites as artificial joint bearing surfaces to increase their fluid film lubrication and therefore reduce the number of failures which have been attributed to wear mechanisms related to frictional forces. The fluid generated between the surfaces supports part of the load and prevents direct contact of the bearing surfaces. In order to obtain optimum elastoh...

We report a catalytic system that produces olefin block copolymers with alternating semicrystalline and amorphous segments, achieved by varying the ratio of alpha-olefin to ethylene in the two types of blocks. The system uses a chain shuttling agent to transfer growing chains between two distinct catalysts with different monomer selectivities in a single polymerization reactor. The block copoly...

forced eruption of impacted teeth.1-8 Elastics, elastomeric chain, and elastic thread usually require frequent reactivation. Cantilever springs are highly elastic and exert relatively long-lasting forces, but tend to break easily and can be uncomfortable for patients. To address these problems, my practice developed the Easy-Way-Coil (EWC) system, which is more robust and comfortable than canti...

Elastomeric proteins are molecular springs that confer excellent mechanical properties to many biological tissues and biomaterials. Depending on the role performed by the tissue or biomaterial, elastomeric proteins can behave as molecular springs or shock absorbers. Here we combine single-molecule atomic force microscopy and protein engineering techniques to create elastomeric proteins that can...

Seismic hazards remained as a challenge to engineers over ages. In order to reduce loss of life and damage to property due to earthquake, several techniques have been developed among which Seismic Isolation technique using Elastomeric Isolators has gained high acceptance and becoming popular all over the world, due to its simplicity, reliability and overall cost effectiveness. Seismic Isolation...

Polyhydroxyalkanoates (PHAs) composed of a mixture of short-chain-length-medium-chain-length (SCL-MCL) hydroxyacyl monomers are biologically produced polyesters that have properties ranging from thermoplastic to elastomeric, dependent on the molar ratio of SCL to MCL monomers incorporated into the copolymer. Because of the potential wide range of properties and applications for SCL-MCL PHA copo...