Surface Leakage Resistance of Glasses

Surface Microroughness of Optical Glasses

The Center for Optics Manufacturing (COM) at the University of Rochester has made significant advances in the fabrication of precision optical components using deterministic microgrinding with rigid, computer-controlled machining centers and high-speed tool spindles. In deterministic microgrinding, the infeed rate of the microgrinding tool across the optical workpiece is optimized and controlle...

Elastic properties and surface damage resistance of nitrogen-rich (Ca,Sr)-Si-O-N glasses

The Effect of Adding Different Antibiotics on the Resistance against Bacterial Leakage of AH 26 Sealer

Aim: Most endodontic sealers show antimicrobial activity before setting, but most of them also lose this ability after setting. Addition of an antibiotic may affect the properties of sealers such as sealing ability, setting time, and so on. The aim of this study was to assess whether the addition of antibiotics (amoxicillin, doxycycline, and clindamycin) improves the sealing ability of AH 26 se...

Effect of P2O5 on Crystallization Behavior and Chemical Resistance of Dental Glasses in the Li2O-SiO2-ZrO2 System

Commercial dental lithium disilicate based glass-ceramics containing various amounts of P2O5 were synthesized. Regarding the crystallization behavior and physico-chemical properties of the glasses, the optimum percent of P2O5 was determined.as 8 %wt. Crystallization behavior of the glasses was investigated by X-ray diffraction (XRD) and differential thermal analysis (DTA). The micro-hardness a...

Possible differences between the surface and bulk structure of glasses

0022-3093/$ see front matter 2008 Elsevier B.V. A doi:10.1016/j.jnoncrysol.2008.07.017 * Corresponding author. E-mail address: [email protected] (T. Changes in cation co-ordination at glass surfaces (indicating an increase of the oxygen-to-cation ratio within the topmost superficial layers) are evidenced by comparing data acquired by spectroscopic techniques of different excitation d...