Co-Cr alloy porcelain teeth are typical non-precious metal porcelain teeth. It is natural, beautiful, reliable and wear-resistant, and it is loved by patients with relatively poor economic environment because of its relatively low price. Many patients are also worried that Co-Cr alloy porcelain teeth are cheap, so will there be any deviation in their own quality or effect? Here, experts from Wuxi Hongqiao Stomatological Hospital specially explained this problem for us. Is it harmful to choose standard cobalt-chromium alloy porcelain teeth in Hongqiao Stomatological Hospital? Regarding the harm of cobalt-chromium porcelain teeth, an ordinary porcelain tooth, stomatological hospital experts pointed out that according to relevant research reports, cobalt metal is more active than other metals, so it has a higher effect of producing gingival black lines and a slight toxic reaction. Cobalt-chromium alloy uses cobalt metal with more stable performance instead of nickel metal. Compared with the metal with more stable performance, the appearance effect of gingival black line is much worse. In addition, although Co-Cr alloy porcelain teeth are one of the common porcelain teeth, Co-Cr alloy porcelain teeth also belong to the upper-middle grade porcelain teeth, which can also be said to be semi-precious metals. Generally, the cause of gingival discoloration is mostly the inlay of nickel-chromium alloy, because some people are allergic to nickel, which will cause gingival discoloration; Another reason is that the porcelain-fused-to-metal teeth do not enter the gums at the edge (the position where the denture edge contacts the gums). After a long time, food residues enter, corroding the teeth and causing discoloration. Therefore, the above symptoms are not due to the influence of Co-Cr alloy porcelain teeth. Moreover, Co-Cr porcelain teeth have better adaptability to teeth, metal stability and tooth tightness, including light weight. Experts pointed out that the cost of Co-Cr alloy porcelain teeth is significantly lower than that of precious metal porcelain teeth and all-ceramic teeth. Compared with nickel-chromium porcelain teeth, cobalt-chromium porcelain teeth are safer.