Why Does My Old Crown Have a Black Line at the Gums? (Encino Cosmetic Repair)
Dental crowns are routinely used to restore damaged teeth; however, patients sometimes observe a dark line at the gum margin, particularly with porcelain-fused-to-metal (PFM) restorations. This article examines the causes of this discoloration and outlines cosmetic repair options available in Encino. Understanding the underlying mechanisms—metal exposure, gum recession, and material selection—enables patients to make informed decisions about oral health and... read more »