Binding Performance of a Zirconia Framework Material and Veneering Porcelain
In this study,the binding performance of a Cerconbased zirconia framework material and special Cercon Ceram S zirconia veneering porcelain is discussed. Rectangular 30 mm × 20 mm × 2 mm porcelain blocks were made from zirconia using the CAD/CAM system. The 2 mm veneering porcelain was then sintered onto blocks at a temperature of 850-800℃with a loading speed of I mm/min. The shear bond strength of the interface was tested. Sintering was studied by visual observation,scanning electron microscopy,energy dispersive spectroscopy (EDS), thermal shock test and other methods. Excellent sintering results of the zirconia framework material and veneering porcelain can be achieved. The cross-sectional morphology of the samples,observed by SEM. shows a uniform,fine. and smooth texture for the veneering porcelain,whereas that of the zirconia fiamework material shows a rough surface with a uniform and compact texture. EDS results indicate that a small amount of Al2O3 and SiO2 is present in the zirconia area,and no ZrO2 or Y2O3 is detected in the veneering porcelain area. No interlayer radial crack or flaw is found throughout the entire thermal shock test of the samples at 60-240℃. Thus,the cracking temperature of the samples is pegged at △T>240℃. The shear bond strength of the interface is 32.62±5.77 MPa. Chemical element infiltration exists between zirconia and the veneering porcelain, indicating the chemical bond between the two. An excellent match between the Cercon-based zirconia framework and the special veneering porcelain can be achieved, which can satisfy clinical requirements.
Zirconia Shear bond strength Thermal shock test
SHAO Longquan DENG Bin YI Yuanfu LIU Qi ZHANG Weiwei WEN Ning
Department of Stomatology,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China Department of Stomatology,the General Hospital of Chinese PLA,Beijing 100853,China Department of the Stomatology,The General Hospital of Chinese Peoples Armed Police Forces,Beijing 1
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
186-189
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）