[Effect of surface treating methods on the shear strength of luting cements to Cercon zirconia].
OBJECTIVE
To study the effect of surface treating methods on the shear strength of Panavia F luting cements to Cercon zirconia.


METHODS
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.


RESULTS
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.


CONCLUSIONS
Sand blasting is a effective means to increase the shear strength, and 600# sand paper treatment and silanization can't increase the shear strength.
Department of Yuquan Hospital of Qinghua University, Beijing 100049, China. m.y.g.6212@163.com
Yong-gang
YG
Ma
Xu-liang
XL
Deng
Feng
F
Xian
Wei
W
Yang
Nian
N
Zhang
D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
D003738:Dental Cements; C438843:Panavia-Fluoro; D019279:Resin Cements; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide