Crowns have served patients as quality dental restorations for centuries, and they have vastly improved over the course of recent decades. While dental crowns were commonly made of metals like gold or silver for a long time, these crowns cause issues both cosmetic and practical, as they can be quite distinct from the natural teeth and can be quite uncomfortable due to metals expanding or contracting due to temperature changes.

More recently, porcelain-fused-to-metal crowns became the norm because they created a more lifelike restoration. Unfortunately, these crowns can begin to show their metal bases underneath their porcelain shells as they age, revealing a thin but unsightly black line underneath them near the gumline. Here’s how this issue can be remedied by replacing porcelain-fused-to-metal crowns with all-ceramic restorations.