نتایج جستجو برای: protective materials
تعداد نتایج: 545555 فیلتر نتایج به سال:
PURPOSE To investigate the buffering capacity of restorative materials during a simulated carious and intrinsic erosive attack. MATERIALS AND METHODS Cavities with a volume of 130 μl were milled (Cerec MC XL) out of blocks of Ceram X Mono (CM), Quixfil (QX), Filtek Supreme (FS), Apa Fill 3 (AF), an experimental dual-curing composite containing a bioactive glass (EX), Dyract eXtra (DY), Beauti...
having conducted the experiment and analysed the data, the researcher computed the groups mean scores and variances for the test relating to the research question. as the final atep, a t-test was conodonted for the hypothesis. as noted earlier, the significance level was determined at .05 and .01 respectively. the observed t-value was higher than the critical t-value at. 5 and .01 levels. conse...
The properties of composite materials including those of biological origin depends very much upon structure. We consider here viscoelastic properties in which the stiffness depends on time or frequency, and microelastic properties in which there is dependence of stress upon spatial gradients of strain. The complex structural hierarchy of composite materials, particularly biological ones, gives ...
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