A crown may last a lifetime, but sometimes it can become broken or chipped.
If you find yourself in this situation, whether it can be repaired will depend on the amount of damage and the type of crown you have.
What is a Dental Crown? : A dental crown is a restoration that surrounds a tooth and covers or forms a “cap” above the gum line, so the tooth is restored to a normal appearance.
Crowns are used when a tooth is broken or damaged to the extent that a filling won’t restore its natural function. If a tooth is cracked from a blow to the face, for example, a crown can hold the tooth together and keep it from further damage.
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Crowns are also used to cover a discolored tooth, attach a bridge or prevent a fracture in a weak tooth.
To make a crown, the dentist first reduces the size of the tooth so that the crown can fit over it. An impression is made of your teeth so that a lab can make a custom crown.
° Souce : absolutedental.com