钇稳定氧化锆基底材料与饰面瓷结合性能的实验研究

Study on the compatibility of yttria-stabilized zirconia framework bonded to the corresponding veneering ceramic

目的考察国产氧化钇稳定四方晶体氧化锆(3Y-TZP)与4种氧化锆专用饰面瓷界面的结合性能。方法粉浆涂塑方法分别将VITA VM9、SHOFU VINTAGE ZR、IPSe.max Ceram、Cercon ceram kiss 4种氧化锆专用饰面瓷烧结在15mm×5mm×5mm的3Y-TZP核瓷试件上,另外制作相同尺寸镍铬合金烤瓷试件作为对照,测试界面剪切强度。制作氧化锆基底与饰面瓷双层瓷试件,扫描电镜(SEM)观察结合界面微观形貌;能谱分析(EDS)检测界面元素分布。结果氧化锆与VITA VM9、SHOFU VINTAGE ZR、IPSe.max Ceram、Cercon ceram kiss 4种氧化锆专用饰面瓷的剪切强度分别为(18.83±1.77)MPa、(23.83±7.05)MPa、(17.87±2.30)MPa、(22.26±7.45)MPa,各组与金属烤瓷对照组比较,差异均无统计学意义(P>0.05)。各3Y-TZP烤瓷组试件破坏模式以界面破坏为主。扫描电镜观察氧化锆和饰面瓷结合界面结合紧密;能谱分析结果显示二者存在化学元素渗透。结论国产3Y-TZP与饰面瓷材料界面结合良好,可以满足临床需要。

Objective To investigate the bonding properties and interface characterization of a domestic 3mol yttrium-stabilized tetragonal zirconium polycrystal （3Y-TZP） framework fired on with 4 different veneering ceramics for zirconia. Methods 4 different commercial veneering ceramics for zirconia （VITA VM9, SHOFU VINTAGE ZR, IPS e.max Ceram, Cereon ceram kiss） were sintered on 3Y-TZP rectangulars（15 min×5 mm×5 mm） according to the manufacturers＇ instructions for shear bond strength test, a metal-ceramic system（Ni-Cr alloy/VITA VMK95） was fabricated in the same type as a control group. Two bilayered specimens （3Y-TZP/VITA VMg, Ni-Cr/VMK95） were prepared for scanning electron microscope （SEM） and energy distribution spectrum （EDS）. Results The values of shear bond strength test were （18.83±1.77） MPa for 3Y-TZP/VITA VM9, （23.83±7.05） MPa for 3Y-TZP/SHOFU VINTAGE ZR, （17.87±2.30） MPa for 3Y-TZP/IPS e.max Ceram, （22.26±7.45） MPa for 3Y-TZP/Cercon ceram kiss, （20.55±5.13） MPa for Ni-Cr alloy/VITA VMK95. There was no statistically significant between all-ceramic groups and the control group （P〉0.05）. The failure modes in all-ceramic groups showed predominately adhesive at the interface. SEM showed the 3Y-TZP/VITA VM9 contacted tightly at the interface, while EDS detected Si element diffused into 3Y-TZP material. Conclusion The results indicate that domestic 3Y-TZP has a good interface compatibility with 4 commercial veneering ceramics, as a dental framework material, it can satisfy the clinical requirements.