It has better toughness with 20% nano-zirconia, is suitable dental all-ceramic restoratives.

纳米氧化锆含量为20%时，具有较好的增韧效果，适合口腔修复材料。

Objective: to repair the porcelain fused to metal restoratives of unlocking porcelain directly in mouth.

目的：直接在口腔内修补脱瓷的金属烤瓷冠桥。

The quality of impression plays a very important role in the accuracy and quality of the final restoratives.

口腔印模的质量直接影响修复体的准确性和修复质量。

Sea cucumber is one of restoratives in traditional Chinese drug. It contains many biological active components, such as saponins and mucopolysaccharides.

海参是我国传统补益药，其中含有多种生物活性成分，如皂甙类和粘多糖类。

Conclusions:The technique of repairing the porcelain fused to metal restoratives of unlocking porcelain directly in mouth by spot-electrolytic etching is practical.

结论：运用胶体微电解池电化学方法即点式电解蚀刻的方法可直接在口腔内修补脱瓷的金属烤瓷冠桥，短期临床效果好。