Aging performance of dental zirconia sintered by difference method
10.3969/j.issn.1001-3733.2015.06.006
- VernacularTitle:烧结方式对氧化锆陶瓷老化性能的影响
- Author:
Xiaohui SU
;
Liyan WU
;
Songling LI
;
Lei WANG
- Publication Type:Journal Article
- Keywords:
Microwave;
Second-time sintering;
Nano-meter zirconia;
Accelerated aging
- From:
Journal of Practical Stomatology
2015;(6):766-769
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the effects of aging performance on the property of dental zirconia sintered by microwave furnace and conventional furnace.Methods:48 zirconia wafer specimens were fabricated and randomly divided equally into 2 groups.The samples were sintered in a microwave furnace(Mgroup)and a conventional furnace(C group)respectively.The samples from the 2 groups were divided into 2 sub-groups and treated by room temperature and dry condition(A group)and 1 34 ℃ with 0.2 MPa pres-sure(B group,accelerated aging)respectively.The m phase fraction of the samples was determined by X-ray diffraction analysis.The biaxial flexural strength was examined by universal testing machine.The fracture cross section was observed by SEM.Results:CB and MB groups showed higher m phase fraction than CA and MA groups(P <0.05).The grain size of zirconia sintered by microwave method was uniform.The fracture surface of zirconia showed no obvious crack and no grain size change after accelerated aging.The biaxial flexural strength of the samples showed no significant difference among groups(P >0.05).Conclusion:The aging perform-ance of zircinia sintered by microwave method were similar to that sintered by conventional method.
