Crown is a tooth shaped cap placed over a tooth to improve its appearance. It also helps to resize and restore its strength. Dental crowns encase the entire visible portion of a tooth laying above the gum line. Crowns are needed to protect weak tooth from further decay. It also helps to hold a dental bridge in place, cover discolored teeth, cover a dental implant and to apply a cosmetic modification. Visit your dentist to protect your teeth with dental crowning and caps.