Aging performance of dental zirconia sintered by difference method / 实用口腔医学杂志

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).Conclusion:The aging perform-ance of zircinia sintered by microwave method were similar to that sintered by conventional method.