Process for preparing a fully ceramic dental restoration and a fully ceramic dental restoration

摘要

"PROCESS FOR PREPARING TOTAL CERAMIC DENTAL RESTORATION AND TOTAL CERAMIC DENTAL RESTORATION". The present invention relates to a process for the preparation of an all-ceramic dental restoration comprising thermally compressing a tooth compression colored glass into a full or partial yttria-doped tetragonal zirconia (YTZP) support structure. composed of yttria-doped tetragonal zirconia ceramic having a grain size as measured by the linear intersection method of less than 0.6 micrometres, where the compression glass has a coefficient of thermal expansion (TEC) of 9.0 and 11.0 micrometers / mK (measured in the range 25 to 500 198 C) and where the compression glass has a compression temperature between 750 and 1,000 198 C. In another aspect, the invention relates to an all ceramic dental restoration comprising a partial or total yttria-doped tetragonal zirconia (YTZP) support structure and a hot-pressed colored tooth compression glass whose restoration is shaped to be in occlusive contact with the opposite tooth and in mesio-distal contact with neighboring teeth.