نتایج جستجو برای: light penetration
تعداد نتایج: 430628 فیلتر نتایج به سال:
under the contemporary scenario of global climate change and increasing coastal eutrophication, baseline studies of phytoplankton diversity and distribution in relation to habitat conditions constitute the first approach to evaluate potential shifts at the base of the food webs. here we present data of phytoplankton species composition and environmental variables in winter 2006 in a temperate ...
background: despite widespread clinical uses of resin-modifi ed glass-ionomers (rmgis), their sealing ability is still a concern. this study evaluated the effect of delayed light activation (dla) of rmgi on marginal sealing in differently pretreated cavities. materials and methods: in this in vitro study, two standardized class v cavities were prepared on the buccal and lingual surfaces of 56 s...
polymerization contraction may produce defects in the composite - tooth bond. this may lead to bond failure and microleakage. the aim of this study was to reduce microleakage of posterior composites using different methods. 45 molar and premolars extracted teeth were choosen. the cavities were randomly assigned into 5 groups of 9. box-shaped cavities were prepared on each side of proximal surfa...
OBJECTIVES The purpose of this study was to evaluate the in vitro sealing ability of three repair materials. Mineral trioxide aggregate (MTA; Group A), calcium phosphate cement (CPC; Group B), and light cured glass ionomer cement (GIC; Group C) when used to repair the perforation created in the pulpal floor of fifty extracted human permanent molars. MATERIALS AND METHODS Preparation of access...
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