نتایج جستجو برای: abrasivity index
تعداد نتایج: 396129 فیلتر نتایج به سال:
The statistics of using downhole electric submersible pump (ESP) units in the oil fields Eurasia show that hydroabrasive wear is a common cause ESP emergency failures. authors this study theoretically and experimentally investigated peculiarities water–abrasive components. research methodology construction laboratory bench are described, results experimental studies determination changes abrasi...
BACKGROUND The aim of this study was to compare the abrasivity of various commercially available toothpastes that claim to reduce dentin hypersensitivity. METHODS Dentin discs were prepared from 70 human extracted molars. The discs were etched with lemon juice for 5 min, and one half of the discs were covered with aluminum tape. Following this, they were brushed with 6 different toothpastes, ...
This single-center, randomized, placebo-controlled, four-treatment, four-period crossover study compared the enamel remineralization effects of low- and medium-abrasivity gel-to-foam toothpastes and a reference toothpaste (all 1,450 ppm fluoride as NaF) versus placebo toothpaste (0 ppm fluoride) using a short-term in situ erosion model. Subjects (n = 56) wearing a palatal appliance holding acid...
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