负热膨胀材料Zr_2WP_2O_(12)调控牙科氧化锆陶瓷膨胀系数的研究  

Study on the adjustment of the expansion coefficient of dental zirconia ceramic with the negative thermal expansion material Zr_2WP_2O_(12)

作　　者：郑现涛 程涛[1] Zheng Xiantao;Cheng Tao(Dept of Prosthodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052)

机构地区：[1]郑州大学第一附属医院口腔科,郑州450052

出　　处：《安徽医科大学学报》2019年第1期85-89,共5页Acta Universitatis Medicinalis Anhui

基　　金：中国博士后科学基金项目(编号:2017T100805);河南省科技攻关项目(编号:182102310015)

摘　　要：目的介绍一种调节牙科氧化锆(ZrO_2)热膨胀系数(CTE)的方法,减少临床因氧化锆核瓷与饰瓷CTE不匹配导致饰瓷的崩瓷。方法采用固相烧结法制备Upcera ZrO_2/Zr_2WP_2O_(12)复合陶瓷。采用X射线衍射(XRD)、热膨胀仪(DIL)、扫描电子显微镜(SEM)对样品进行测试和分析,并测试和分析了制备的复合陶瓷样品的力学性能。结果Upcera ZrO_2/Zr_2WP_2O_(12)复合陶瓷的CTE在一定小范围内[Zr_2WP_2O_(12)(ZWP)的质量分数<3 wt%]随着负热膨胀材料(NTE) ZWP的增加而逐渐降低。当负热膨胀材料ZWP的质量分数为2 wt%时,Upcera ZrO_2/ZWP复合陶瓷的力学性能最佳,与Upcera ZrO_2陶瓷制备的样品接近,差异无统计学意义(P> 0. 05),此时复合陶瓷的膨胀系数为9. 6×10-6/℃,介于Upcera ZrO_2与饰瓷之间。结论负膨胀材料ZWP可以有效调节Upcera ZrO_2的膨胀系数,两者复合而成的复合陶瓷的膨胀系数介于Upcera ZrO_2与饰瓷之间,且能够满足临床对力学性能的要求。Objective To introduce a method of adjusting the coefficient of thermal expansion of dental zirconia ceramic,which contributing to reduce the chipping of the veneering porcelain caused by the mismatch of the expansion coefficients of zirconia and veneering porcelain. Methods Upcera ZrO2/Zr2WP2O12 composite ceramic was synthesized by solid-state reaction method. XRD,DIL and SEM were used to test and analyze the composite samples and mechanical properties of the composite samples were investigated too. Results The expansion coefficients of Upcera ZrO2/Zr2WP2O12 composites decreased with the mass fraction of the negative thermal expansion material( NTE) Zr2WP2O12 increasing in a small range( the mass fraction of Zr2WP2O12< 3%). When the weight percentage of Zr2WP2O12 was 2%,the mechanical properties of the Upcera ZrO2/Zr2WP2O12 composites were best and close to Upcera ZrO2,without any statistical significance( P > 0. 05). And its expansion coefficient was 9. 6 ×10^-6/℃,between the expansion coefficients of zirconia and veneering porcelain. Conclusion The negative thermal expansion material Zr2WP2O12 can adjust the expansion coefficient of Upcera ZrO2 effectively. And the expansion coefficient of Upcera ZrO2/Zr2WP2O12 composite is between the expansion coefficients of zirconia and veneering porcelain. Mechanical properties of Upcera ZrO2/Zr2WP2O12 composite can meet the clinical requirements.

关 键 词：氧化锆 饰瓷 热膨胀系数 负热膨胀材料 Zr2WP2O12 

分 类 号：R783.1[医药卫生—口腔医学]