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The Effect of Incorporation of 0.5 %wt. Silica Nanoparticles on the Micro Shear Bond Strength of a Resin Modified Glass Ionomer Cement | ||
| Journal of Dentistry | ||
| مقاله 9، دوره 20، شماره 2 - شماره پیاپی 63، شهریور 2019، صفحه 124-130 اصل مقاله (194.37 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.30476/dentjods.2019.44923 | ||
| نویسندگان | ||
| Mohammad Bagher Rezvani1؛ Mohammad Atai2؛ Hamid Safar Alizade3؛ Mahshid Mohammadi Basir1؛ Fatemeh Koohpeima4؛ Saba Siabani* 5 | ||
| 1Dept. of Operative Dentistry, School of Dentistry, Shahed University, Tehran, Iran. | ||
| 2Dept. of Polymer Science, Iran Polymer and Petrochemical Institute, Tehran, Iran. | ||
| 3General Dentist, Private Practice, Tehran, Iran. | ||
| 4Dept. of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. | ||
| 5General Dentist and Dental Specialties Candidate, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. | ||
| چکیده | ||
| Statement of the Problem: The clinical success of glass ionomer restorations depends on the strength of resin-modified glass ionomer (RMGI) cement bonding to dentin and there is limited information available regarding the bond strength of resin modified glass ionomers containing silica nanoparticles to dental structures.Purpose: The aim of this study was to compare the microshear bond strength (µSBS) of RMGI with and without silica (SiO2) nanoparticles to dentin of permanent teeth.Materials and Method: in this experimental study, the occlusal surfaces of 30 freshly extracted intact third molars were ground to expose the flat dentin and after conditioning with 20% poly acrylic acid, were randomly assigned to two main groups (n=15). The first group was filled with RMGI (Fuji II LC, GC) and the second group was filled with RMGI plus 0.5%wt. silica nanoparticles. Then, each main group was divided into three subgroups, and then stored in an incubator at 37 oC with 100% humidity for 1, 7, and 30 days. The µSBS test was performed using a universal testing machine (1 mm/min). The data were analyzed by t-test, repeated measures ANOVA and Tukey test (p < 0.05).Results: There were no statistically significant differences between the mean µSBS of the groups with and without nanoparticles along the different storage periods (p> 0.05). There was significant difference in µSBS values among the three different storage periods in all the tested materials (p < 0.05).Conclusion: Incorporation of 0.5 %wt. silica nanoparticles did not compromise the µSBS of Fuji II LC RMGI to dentin.Key Words Glass Ionomer; Silica; Nanoparticles ; Shear Strength | ||
| کلیدواژه‌ها | ||
| Glass Ionomer؛ Silica؛ Nanoparticles؛ Shear Strength | ||
| مراجع | ||
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