All-ceramic crown prepared by a new method

我们设计了一种生产全瓷冠的方法，这种方法可以在很短的时间内以低成本实现。然而，要使其广泛使用，仍有必要改进。4步堆积最适合于生产0.5 mm厚的顶盖。三点弯曲强度显著提高，达到183~211.3 Mpa，粗细比为40：50(wt%)时强度最高。基牙预备设计对基牙冠适合性无影响。建议在干燥过程中使用热风来提高体能。即使玻璃渗透烧成时间缩短了30分钟，玻璃也渗透到了足够的程度。

We devised a production method for copings of all-ceramic crowns, which is possible at low cost and in a very short time. However, improvement was still necessary to make it widely available. A 4-step build up was most suitable for producing a coping of 0.5 mm in thickness. We found that the 3-point bending strength of the coping markedly increased to 183-211.3 MPa, and the highest strength was achieved when the mixing ratio of rough to fine grains was 40:50 (wt%). The fitness of coping did not have the influence by the preparation design of abutment tooth. It was suggested that fitness was improved by using a hot blast in a dry process. Even if glass infiltration firing time was shortened for 30 minutes, the glass infiltrated it enough.