en ترمیمی Cosmetic and Restorative Dentistry پژوهشي Research <p> <strong>Objectives</strong> The aim of this study was to investigate the effect of Ca3SiO5 on reducing enamel demineralization under pH-cycling conditions. <strong></strong></p><p> <strong>Methods</strong> Forty bovine enamel samples were treated under four conditions: group 1, double distilled water (negative control) group 2, 1000ppm F (as NaF, positive control) group 3, Ca3SiO5 slurry and group 4, Ca3SiO5–F slurry (Ca3SiO5 with 1000ppm F aq.). All the specimens were treated with treatment materials 4 times each day. Samples in groups 1 and 2 were soaked in test solutions for 2min and samples in groups 3 and 4 were painted in treatment slurry for 2min. At times between treatments, they were immersed in citric acid solution 3 times a day and 15s each time. All the procedures were repeated for 7 days. Knoop microhardness, scanning electron microscopy (SEM), X-ray diffraction (XRD) and atom force microscopy (AFM) were used to examine samples. </p><p> <strong>Results</strong> After treatment for 7 days, enamels in all the groups were significantly softened. The extents of microhardness reduction were 52.3%, 28.5%, 28.5% and 20.2% for groups 1, 2, 3 and 4, respectively. Samples in the negative control group showed a typical acid etched pattern while enamels in other groups were relatively compact. There was no significant difference between samples treated with Ca3SiO5 and F. The combination of Ca3SiO5 with F showed the best effect on reducing enamel demineralization. </p><p> <strong>Conclusions</strong> Ca3SiO5 is an effective material against enamel demineralization alone but in combination with F a better anti-demineralization effect may be obtained. </p><hr><p></p><p> <strong>Source: </strong>Journal of Dentistry </p><p><a href="http://www.jodjournal.com/article/S0300-5712(12)00265-5/abstract"><font color="#0033ff"> Full Text</font></a> </p> Tricalcium silicate, Bioactivity, Demineralization, Remineralization, Enamel 0 0 http://idai.ir/browse.php?a_code=A-10-32-832&slc_lang=en&sid=1 Yueyue Wang 10031947532846003639 10031947532846003639 No State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China Xiaoke Li 10031947532846003640 10031947532846003640 No Unilever R&D, 66 Linxin Road, Shanghai 200233, China Jiang Chang 10031947532846003641 10031947532846003641 Yes State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China Chengtie Wu 10031947532846003642 10031947532846003642 No State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China Yan Deng 10031947532846003643 10031947532846003643 No Unilever R&D, 66 Linxin Road, Shanghai 200233, China