Akademik Veri Yönetim Sistemi
MATERIALS RESEARCH INNOVATIONS, cilt.13, sa.2, ss.124-128, 2009 (SCI-Expanded)
This paper compared the effect of storage pH on some mechanical properties of adhesive luting agents. Five luting cements were tested (resin - Duocemet kit, glass ionomer - Aquacem, carboxylate - Durelon, zinc carboxylate - Adhesor carbofine and zinc polycarboxylate cements - Carbchem). Compressive strengths were determined in accordance with American National Standards/American Dental Association (ANS/ADA) specification. Using a Teflon mould, cylindrical specimens 12 mm high and 6 mm in diameter were made. For diametral tensile strength, specimens were prepared in 6 mm diameter and 2 mm thickness. The specimens were stored in artificial saliva that has different pH value ranges of 4, 5.5 and 7. After the two weeks' storage at 37 degrees C and 100% humidity, the specimens were loaded at crosshead speed of 0.5 mm min(-1) and the failure load was recorded. Ten specimens were made and tested for each group with Hounsfield Tensometer Testing Machine. Results showed that the cement type was statistically significant (p<0.001). The storage media was not significant on compressive and diametral tensile strength of luting agents. The multiple comparisons of means were performed using Duncan's post-hoc test. Resin cements showed the highest value both compressive strength and diametral tensile strength. This material was statistically stronger than carboxylate cements, glass ionomer cements, zinc carboxylate and zinc polycarboxylate cements. Dual cure resin luting cement displayed the highest diametral tensile, compressive strength and were statistically stronger than carboxylate cement (Durelon) followed by zinc polycarboxylate cement ( Carbchem), zinc carboxylate cement (Adhesor carbofine) and conventional glass ionomer ( Aquacem).