Effect of surface treating methods on the shear strength of luting cements to Cercon zirconia / 中华口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the effect of surface treating methods on the shear strength of Panavia F luting cements to Cercon zirconia.</p><p><b>METHODS</b>Forty sample disc of Cercon zirconia with 20 mm in diameter and 4 mm in height were prepared. Another 40 sample discs with 5 mm in diameter and 4 mm in height were also prepared Both of the two types of samples were randomly devided into four groups A, B, C, and D in which different surface treatments were delivered. In group A samples was treated with 600# sand paper, and in group Bwith sand blasting, and silanization in group C, and sand blasting plus silanization in group D. All samples were bonded with Panavia F luting cement under the aid of glass mould. The value of shear strength was measured and statistically analysed.</p><p><b>RESULTS</b>The shear strength of four groups of samples were (21.50 ± 1.98), (23.68 ± 2.31), (20.69 ± 1.55), (24.01 ± 2.19) MPa respectively. The population mean was not equal. There was no significant difference between 600# sand paper treated group and silanization group, nor between sand blasting group and sand blasting plus silanization group.</p><p><b>CONCLUSIONS</b>Sand blasting is a effective means to increase the shear strength, and 600# sand paper treatment and silanization can't increase the shear strength.</p>