摘要
目的探索陶瓷自由成形制备全瓷牙种植体的工艺,并研究烧结温度对氧化锆陶瓷主要性能的影响。方法采用固相含量为55vol%的氧化锆陶瓷浆料,通过自由成形的方法制备试样,并用无压烧结方法在1 100℃、1 200℃、1 300℃和1 400℃下烧结试样,保温2 h,随炉冷却。对烧结试样的致密化程度、抗弯强度、微观形貌及相组成进行测试。结果试样最大收缩率为16.83%,致密度可达98.36%;1 300℃试样3点抗弯强度达到480 MPa;1 400℃试样X射线衍射检测出单斜相氧化锆的衍射峰,抗弯强度有所下降。结论陶瓷自由成形技术在牙科修复体制造领域具有广阔的发展前景,1 300℃烧结温度下试样综合性能最优,为最佳烧结温度。
Objective To explore the process of preparing all-ceramic dental implant by freeform fabrication,and study the influence of sintering temperature on main performance of zirconia ceramic.Methods The high solid content（55 vol %） slurry of zirconia ceramic was used to prepare dental implant by freeform fabrication.The sintered samples were performed at 1 100 ℃,1 200 ℃,1 300 ℃ and 1 400 ℃ for 2-hour by pressureless sintering method with furnace cooling.Then the degree of densification,flexural strength,morphology and phase composition were tested.Results The maximum shrinkage of sample was 16.83 %,bulk density was 98.36 %,the flexural strength of sample sintered at 1 300 ℃ was 480 MPa,and diffraction peak of monoclinic zirconia was detected in sample sintered at 1 400 ℃ by X-ray diffraction,which caused the decrease of flexural strength.Conclusion It is demonstrated that the freeform fabrication has broad prospects in dental restoration manufacturing,the sample sintering at 1 300 ℃ has the best overall performance,and 1 300 ℃ is the best sintering temperature.
出处
《生物医学工程与临床》
CAS
2011年第6期521-525,共5页
Biomedical Engineering and Clinical Medicine
基金
口腔生物医学教育部重点实验室(武汉大学)开放研究基金
关键词
陶瓷自由成形
3Y-TZP
牙种植体
常压烧结
ceramic freeform fabrication
3Y-TZP
dental implant
pressureless sintering
