Crowns and Bridges
Dental crowns, also known as "caps" preserve the functionality of damaged teeth.
A dental crown may be used to protect a cracked tooth, restore functionality of a tooth with excessive decay or replace a pre-existing crown.
If tooth decay or damage is so extensive that veneers, direct composite bonding or other conservative treatments aren't viable treatment options or if you have undergone root canal therapy-your dentist will consult with you about dental crowns.

Crown Materials:
1-Porcelain fused to metal
2-All-ceramic (all-porcelain)

The material selected is determined by the clinical demands at hand, esthetic demands, strength requirements, material durability and restorative space available.
Avoid chewing hard foods, ice or other hard objects, since this could damage your crown. It also is important to avoid biting your fingernails and grinding your teeth, which could significantly shorten the life-span of your dental crown. If you habitually clench or grind your teeth, your dentist may recommend wearing a night-time mouth guard to help protect your crowns while sleeping.
Dental crowns may last between 10 and 15 years or longer, though results vary depending upon your unique considerations.