Dark Gums due to Dental Crowns. Ago.

It seems that you have placed metal ceramic crowns which have dark metal substructure as a framework to support your tooth coloured ceramic which is rather weak and will potentially fracture without it. Your’s is a cosmetic case, i would suggest you to place more stronger metal-free ceramic material crowns having zirconia as a substructure like 3M ESPE’s LAVA crowns instead of ugly looking metal substructure or you could go for lithium disilicate material like IPS e.max for your front teeth. Metal free ceramic works wonders for front teeth replacement provided its done with caution and by an expert in the field of cosmetic dentistry (smile designing specialist). He will not only solve your black gums problem but also design your teeth shape and size (digitally may be) in such a way that it makes your smile much more natural and pleasing.

Visit a cosmetic dentist as soon as possible

Check out my profile and feel free to ask any questions regarding this issue. It will be my pleasure to guide you..!