回複：在國內裝烤瓷牙的朋友進來討論一下：有毒金屬鎳鉻醫療安全問題

Don't know much about cases back in China. However, the best option for front teeth would be all porcelain veneers or all porcelain crowns. This way you won't have allergic/toxic reactions to some of the metals in the normal porcealin-fused-to-metal (PFMs) and you won't have a dark/blue shadow along the gum later on.

Good luck.