REBUILD YOUR SMILE WITH CROWNS
Dental crowns (sometimes called “caps”) are thin coverings of specialised material that are used to rebuild a tooth.
There are usually three reasons for the placement of crowns:
- The tooth is so badly damaged by toothwear, dental decay or fillings that it is best saved by using a crown
- Following root canal therapy, to preserve the strength in remaining tooth structure. This is because a root canal treated tooth is significantly weakened by the drilling process during root canal therapy
- The tooth is being used as an abutment (support) for a bridge or denture to replace missing teeth
There are generally three phases to having a crown made for your tooth but you only need to attend for two appointments:
- Preparing (drilling) the tooth in an appropriate fashion for the type of crown chosen. This may involve removing the old filling material, removing the decayed tooth structure or removing cracked or damaged tooth. As a minimum, enough material needs to be removed to create enough space for the replacement crown material. Sometimes, because of the position of the soft tissue (gums), it may be necessary to trim or shape the soft tissue around the teeth with specialised instruments or “retraction cord”. This makes it easier to achieve a good impression (digital scan or with impression material) as well as allowing us to create better aesthetics.
- Making impressions of the prepared tooth, opposing teeth, and the occlusal (bite) relationships to transfer the information to the laboratory. This can be done using a digital scanner, which captures the relevant information and sends it to the laboratory for digital design and fabrication, or it can be done with more the more traditional impression material.
- Selecting a shade for tooth-coloured crowns.
- Fabricating a provisional restoration that will remain in place while the crown is being constructed. This protects the prepared tooth to ensure a close fit of the final crown.
- Fabricate and polish the crown. The laboratory custom makes your crown from the information transferred to them.
- Cementing or bonding the completed crown into position. Once the crown returns from the laboratory it is cemented or bonded onto the tooth or teeth with specialised dental cement. “Cementing” a crown is the traditional method of holding a crown onto the tooth and relies on physical grip between the crown, cement and tooth. “Bonding” a crown into position requires a chemical bond between the tooth, cement and crown and is the modern method used with porcelain crowns.
TYPES OF CROWN MATERIAL
There are 3 types of crown materials:
- Full gold (full cast crown): This type of crown involves making the full crown out of gold or a cast metal. The advantage of a full gold crown is that it is very difficult to chip or damage the crown through misuse. However, they are gold/yellow in colour and not very aesthetic.
- Porcelain fused to metal crown: A porcelain fused to metal crown consists of a metal-alloy base (known as a coping) partially or fully covered by porcelain. Since the metal is covered with a layer of porcelain, it has a much more natural appearance than a gold casting and more closely resembles a natural tooth. The biggest disadvantage of these types of crowns is that the junction between porcelain and metal is a weak point and prone to chipping, or de-laminating.
- Full porcelain crown: These types of crowns approximate the total appearance of an undamaged, natural tooth more closely than any other type of crown. With today’s adhesive technology, these restorations are most often bonded into place with an enamel and dentine bonding agent.
We most commonly use full porcelain crowns due to the tight chemical bond between the crown and tooth. Dental crowns last on average between 10 and 15 years but many crowns last longer with good oral hygiene (especially daily flossing) and controlling of parafunctional habits (such as nocturnal grinding).
|PROCEDURE||COST||TREATMENT LENGTH||NUMBER OF VISITS|
|Full porcelain crowns – Material varies depending on individual requirements||Single – $900 – $975 each|
Two – $750 – $850 each
Three or more – $630 – $750 each
|3-5 business days||1-3|
|Porcelain fused to metal –Price varies depending on type of metal alloy used, non-precious to high precious||Single – from $950 each|
Two – from $850 each
Three or more – from $650 each
|3-5 business days||1-3|
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