OBJECTIVES The aim of this study was to investigate the effect of delayed finishing/polishing on the surface roughness, hardness and gloss of tooth-coloured restorative materials. METHODS Four different tooth-coloured restoratives: a flowable resin composite- Tetric Flow, a hybrid resin composite- Venus, a nanohybrid resin composite- Grandio, and a polyacid modified resin composite- Dyract Ex...

Various grinders (diamond and carbide burs, and soflex disks) were used in polishing the composite filling surfaces. Polishing was carried out 10 minutes and 14 days after the material polymerization. The ground surface was then observed by a scanning electron microscope and the surface roughness expressed in [xm. Better surface polish and lower de­ gree of roughness were observed when polishin...

China has developed into an industry for which polishing is an important step in production. The housings of mobile phones, computers, video cameras and similar consumer goods all need polishing before they can be used and China is a global center for the manufacturing of these parts. When we talk about almost one billion of those parts manufactured in China every year it is clear that even ski...

To date, KEK has developed cleaning techniques for superconducting niobium RF cavities. These include: electro-polishing (EP), buffered chemical polishing (BCP) barrel polishing (BP), high pressure rinsing (HPR), megasonic ]lot water rinsing, degassing water, ozonated water cleaning, waste water treatment, and so oil. In this paper, we present findings from electro-poloishing of cavities, which...

Sik.?I have received the enclosed letter from Mr. Hutchinson of Pusa in regard to the remarks on Electrolytic Chlorogen contained in the report of my paper on "The Selection of a Disinfectant" in the May issue of the Gazette. Whilst I am not entirely in agreement with Mr. Hutchinson in his estimation of costs based only 011 a phenol coefficient,? (Lysol, for instance, is extensively used by gyn...

Aim: To compare the effect of four different polishing systems on color stability of two Nano composite resins immersed in four beverages (Coffee, Tea, Cola and Fanta). Methods: Eighty disc shaped specimens of 10 mm diameter and 2 mm thickness were prepared for each of the two Nano composite resins (Tetric N Ceram; Estelite alpha). The specimens of each material were divided into four groups (n...

Problem statement: Abrasive is one of key influencing factors on the polished surface quality in Chemical Mechanical Polishing (CMP). Solid abrasives in CMP slurries are easy to cause polishing scratches. It is well known that reducing the hardness of abrasives would improve the polished surface quality. Therefore, the change in structure or shape of the abrasives means a change in polished sur...

Nanocrystalline diamond (NCD) thin films grown by chemical vapour deposition have an intrinsic surface roughness, which hinders the development and performance of the films' various applications. Traditional methods of diamond polishing are not effective on NCD thin films. Films either shatter due to the combination of wafer bow and high mechanical pressures or produce uneven surfaces, which ha...

SLUMMARY Both hemodynamic and electrocardiographic effects of Renografin-76 (diatrizoate meglumine) were studied in intact, anesthetized dogs. The left coronary artery in nine dogs was injected with equal amounts of Renografin-76, an equiosmolar dextrose solution (1690 mOsm/1) and a solution of the same electrolytic content (190 mEq/l sodium). Renografin and the dextrose solution produced signi...