采用CAD/CAM和玻璃渗透技术制作高强度全瓷冠的研究

Research on the High Strength All Ceramic Crown by the Combination of CAD/CAM and Glass Infiltrated Alumina Bolcks

目的 探索用 CAD/CAM切削加工和玻璃渗透技术相结合制作高强度全瓷基底冠的方法。方法 采用自行研制的部分烧结氧化铝块 ,经 Cerec CAD/CAM系统加工制作氧化铝基底冠 ,并经玻璃渗透完成高强度底冠的制作 ,再用 Vita alpha饰瓷制作完成全瓷冠。结果 与常规的 In- Ceram技术相比 ,本文方法无需复制耐火代型和 10小时的氧化铝基底冠的烧结过程 ,且由于预成的氧化铝块颗粒分布均匀 ,具有更强的毛细管作用 ,全冠的渗透时间由原来的 4小时缩短为 40分钟。结论 采用工业预成的瓷块 ,经牙科

Objective To search for a method that fabricates the high strength all ceramic crown by the combination of CAD/CAM and glass infiltrated alumina. Methods Alumina coping was milled by the Cerec ⅡCAD/CAM and glass was infiltrated into alumina by the capillary effect. Vita alpha ceramic was used to veneer the surface of substructure for all ceramic crown. Results This technology need not duplicate die and sinter alumina substructure for 10 h, compared with the conventional In ceram technology. The time of glass infiltration has been decreased from 4 h to 40 minutes by the high capillary effects of prefabricated alumina blocks. Conclusion This is a new method for all ceramic crown by using Cerec Ⅱ CAD/CAM to mill a simple ceramic block so as to fabricate prosthetics in clinic.