氧化锆陶瓷表面不同处理方法对剪切强度的影响

Effect of surface treating methods on the shear strength of iuting cements to Cercon zirconia

目的研究Cercon氧化锆陶瓷表面不同处理方法对含有磷酸酯粘接单体的PanaviaF的剪切强度的影响。方法采用600号砂纸打磨、喷砂、硅烷化、喷砂加硅烷化4种表面处理方法，对完全随机分组的4组氧化锆陶瓷试样进行单面处理。在玻璃模具的辅助下，将两块不同规格的试样中心相对地用PanaviaF树脂类水门汀加压粘接固定，万能实验机测定剪切强度并进行统计学分析。结果600号砂纸打磨试样剪切强度（21．50±1．98）、喷砂组剪切强度（23．68±2．31）、硅烷化剪切强度（20．69±1．55）、喷砂＋硅烷化（24．01±2．19）MPa，其总体均数不相等，其中，喷砂组和喷砂加硅烷化组高于600号砂纸打磨组和硅烷化组，P〈0．05；喷砂组和喷砂加硅烷化组之间，以及600号砂纸打磨组和硅烷化组之间的差异无统计学意义（P〉0．05）。结论喷砂是提高树脂粘接剂与氧化锆陶瓷剪切强度的有效方法，而砂纸打磨和硅烷化并不能显著提高剪切强度。

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 discswith 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 whichdifferent 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.