Dental Crown

Dental Crown

What is a Dental Crown?

Dental crown is a restorative or prosthodontic procedure where the dentist reduces tooth structure or enamel around the tooth to restore the normal shape and function of the tooth. It is called a dental crown or tooth cap because it fits over the entire tooth.

The functions of the tooth crown are to restore the function of the teeth, to protect teeth from further damage, to make the damaged teeth stronger, for aesthetics or to change the shape and shade of anterior teeth, to serve as prosthetic crown teeth for dental implants and to act as abutments for dental bridges.

So, who really needs dental crowns?

dental crown Sydney
  1. People who have decayed tooth/teeth
  2. Tooth with large fillings
  3. Stained, crooked, or discoloured teeth
  4. Broken tooth (by accident or trauma)
  5. Root canal treated tooth/teeth
  6. Prosthetics for implants
  7. Abutment for fixed bridges
  8. For night grinders (but with the use of night guard)
  9. People with abrasion, attrition, erosion, and abfraction


There are four types of materials used for dental crown in Sydney:

1. All ceramic

    • All ceramic crowns are porcelain-based filling material
    • Translucent and most naturally looking restorative material
    • Usually advisable for anterior teeth because it can blend well with natural teeth
    • More tooth reduction is needed for better attachment of the restoration
    • May be brittle under heavy mastication
    • Resistant to wear
    • Not as strong as the other teeth  crowns

2. Porcelain fused to metal

    • Metal alloy interior fused to porcelain exterior
    • Provides good seal to prevent leakage and lowers the chance of recurrent dental caries
    • Have a porcelain look on the outside but has the strength of the metal inside
    • Durable restoration than porcelain alone
    • Moderate tooth reduction is needed
    • Usually have a lifespan of 10-15years
    • Will have a show of metal on the gum side after some time
    • One of the disadvantage of porcelain fused to metal crown is the gums around the tooth often turns greyish because of the colour of the metal inside the crown tooth

3. Gold alloys

    • Made of gold, copper and other metals
    • Provides strong adhesion to the tooth structure
    • Resistant to wear and fracture and does not do damage to the opposing teeth
    • Highly biocompatible with the soft tissue
    • Very cost effective since they are strong enough to withstand large forces of mastication
    • Require minimal tooth structure removal
    • Least natural looking dental crown
    • May cause some side effects although side effects are rare, examples of which are swelling and redness, lesions in the mouth, and allergic reactions especially in gold-nickel alloy

4. Base metal alloy

    • Non-noble metals
    • Silver in appearance
    • Resistant to corrosion
    • Durable
    • Least amount of tooth reduction
    • Resistant to wear and gentle to opposing teeth

Advantages of dental crowns:

  1. Restore worn, broken, or decayed teeth
  2. Protect teeth from abrasion, attrition, erosion, and abfraction
  3. Restore or improve chewing function
  4. Improve appearance aesthetically

Disadvantages of dental crowns:

  1. Requires removal of some tooth structure or enamel around the tooth
  2. May cause teeth sensitivity
  3. Can break or fracture over time, especially when not properly maintained
  4. Can trap bacteria and lead to decay of tooth under the crown dental if ill-fitted crown
  5. May cause an allergic reaction in some people
  6. Expensive

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