Filser F, Kocher P, Weibel F, Lüthy H, Schärer P, Gauckler L J
ETH Zürich Sonneggstrasse 5 CH-8092 Zürich, Switzerland. filser, gauckler, kocher,
Int J Comput Dent. 2001 Apr;4(2):89-106.
All-ceramic dental bridges for the molar region are not yet available at reasonable costs. The novel direct ceramic machining (DCM) process allows an easy, reliable and rapid fabrication for all-ceramic dental restorations with high mechanical strength and good biocompatibility. In DCM, an enlarged framework is easily milled out of a pre-fabricated porous ceramic blank made of zirconia. After sintering to full density, no further time-consuming hard machining with diamond tools is needed. For individual esthetical requirements, the framework is coated with a veneer porcelain. Compared to the commercially available In-Ceram Alumina and IPS Empress2 restorations, the mechanical strength of zirconia frameworks is twice as high, allowing the restorations to bear the high mastication forces in the molar region. In terms of reliability, zirconia bridges fabricated by the DCM process are also superior to In-Ceram Alumina and IPS Empress2. A clinical study of three-unit dental bridges in the molar region found no problems after the first year of observation.
用于磨牙区域的全瓷牙桥目前还无法以合理的成本获得。新型的直接陶瓷加工（DCM）工艺能够轻松、可靠且快速地制造出具有高机械强度和良好生物相容性的全瓷牙修复体。在DCM工艺中，一个扩大的框架很容易从由氧化锆制成的预制多孔陶瓷坯料中铣出。烧结至全密度后，无需再用金刚石工具进行耗时的硬加工。根据个体美学需求，框架会覆盖一层饰面瓷。与市售的In-Ceram氧化铝和IPS Empress2修复体相比，氧化锆框架的机械强度高出两倍，使修复体能承受磨牙区域的高咀嚼力。在可靠性方面，通过DCM工艺制造的氧化锆牙桥也优于In-Ceram氧化铝和IPS Empress2。一项针对磨牙区域三单位牙桥的临床研究发现在观察的第一年之后没有出现问题。
