Akademik Veri Yönetim Sistemi
25th Congress of the Balkan Stomatology Society, Sarajevo, Bosna-Hersek, 19 - 21 Mayıs 2022, ss.17
The aim of this
study is to evaluate the effect of gastric acide on the surface microhardness, surface roughness of different resin based
composites. Three different composites (Clearfil Majesty ES-2{Kuraray, Tokyo,
Japan}, Beautifil II{Shofu, Ratingen, Germany}, Group Beautifil II LS{Shofu,
Ratingen, Germany} were used. Samples were formed by using custommade plexiglass molds of 5 mm diameter
and 2 mm thickness. A total of 30 samples (n = 10) for microhardness tests and a
total of 30 samples for surface roughness a total of 9 samples (n = 3) for Scanning
Electron Microscopy (SEM). All samples of
each group were treated to gastric acid for 7 days and 14 days .The
measurements of Vickers microhardness and surface roughness were evaluated at
baseline, after 7 days storage in gastric acide and after 14 days. A Vickers microhardness tester was used to
evaluate the microhardness of the upper surfaces of each sample. Scanning
electron microscopy was used to evaluate the difference on the microstructure of composites. As the
difference in the microhardness values of composites was compared, the
time-dependent variation in all composites was found to be statistically
significant. The most surface roughness
and hardness changes has become in beautiful II groub. As a result, in
in-vitro conditions gastric acid decreased microhardness while increasing the
surface roughness of different composites.
Keywords: gastric
acid, microhardness, surface roughness, SEM