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Dental Crown
Dental Crown is also called dental cap. When you lost your tooth structure and dentists cannot fill the cavity by just normal dental fillings, you are required a crown to cover that tooth. In fact, patients can lost their tooth structure from many causes such as badly tooth decay, broken by accident, undergoing root canal treatment, etc. It would be deemed as a "cover" as the crown will cover or replace part of the tooth seen in the mouth. Another advantage of dental crown is about aesthetic. Dental crown can help patient for teeth appearance and this is called cosmetic dental works or smile makeover because dental crown can correct chip, discolor, misshape and alignment teeth.

Dental Bridge
Dental Bridge is quite similar to dental crown. Normally, dental bridge is consist of two dental crowns and one pontic. Dental bridge is used in the patient who lost their tooth structure and no remaining tooth left to be crowned. Dentist need to use prep crowns on nearby teeth one on the right and one on the left to neighbor pontic and replacing missing tooth space.

Toot loss indication:

  • Gum disease
  • Severe wear
  • Periodontitis
  • Root canal failure
  • Trauma
  • Badly decay
  • Congenital
  • Accident

Types of Dental Crown and Bridge

Porcelain fused to Metal

Porcelain-fused-MetalPorcelain fused to metal are mainly comprise of porcelain and metal alloy basis. The combination of porcelain bonded to a supporting structure of metal creates a stronger restoration than porcelain used alone. The metal provides strength to crown and bridge while porcelain replace natural teeth enamel appearance. Dental crown and bridge restorations are traditionally used for 40-50 years. It is successfully proved to be very strong and durable.

Based Alloy or Non-Precious
Base metal alloys are non-noble metals with a silver appearance. They are used in crowns, fixed bridges and partial dentures. They can be resistant to corrosion and tarnishing. They also have high strength and toughness and are very resistant to fracture and wear.

2.54% Gold or Semi Precious or Noble Alloy
Noble Alloys contain gold, copper and other metals that result in a strong, effective filling, crown or a bridge. They are highly resistant to corrosion and tarnishing. Gold alloys exhibit high strength and toughness that resists fracture and wear. This allows the dentist to remove the least amount of healthy tooth structure when preparing the tooth for the restoration. Gold alloys are also gentle to opposing teeth and are well tolerated by patients. However, their metal colors do not look like natural teeth.

3.87% Gold or Precious or High Noble Alloy
Some patients may show allergic sensitivity to base metals and there may be some initial discomfort from hot and cold. All porcelain crown are recently made to deal with this problems.
Full-Porcelain (Metal Free)

Full-PorcelainBecause porcelain fused to Metal has disadvantages for biocompatible, some patients show allergic sensitivity after use crowns and bridges 1-2 years because of some particular alloys used in crown and bridge.
So, full-porcelain (metal free) play key roles in this kinds of patients. Full porcelain restoration is made of dental materials include porcelain, ceramic or glasslike fillings and crowns. They are also used as inlay/onlay, crowns and veneers. Full-porcelain restorations are particularly desirable because their color and translucency similar to natural teeth.
The disadvantage of full porcelain over porcelain fused to metal is resistant to fracture when placed under tension or on impact. The strength of this type of restoration depends on an adequate thickness of porcelain and the ability to be bonded to the underlying tooth. They are highly resistant to wear but the porcelain can quickly wear opposing teeth if the porcelain surface becomes rough. However, new technology Zirconia can overcome this problem.

IPS Empress Emax
IPS Empress is Alumina Oxide ceramic from Ivoclar Vivadent brand USA. It is typically good enough for most of the cases excepting posterior teeth

Procera another brand from Sweden (Noble Biocare) but made of Alumina Oxide ceramic as well. However, it is used CAD/CAM technology to mill its core.

Zirconia or Zirconium Oxide is widely used in space industry from space suit aircraft parts because of its durable and erosion resistant. Zirconia is the same component of jewelry sub-structure and more suitable for posterior teeth where require greater loading chewing forces. This is latest ceramic technology and the most strength materials in Dentistry market at the moment.
Crown /Caps/ Bridge
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