What is a Dental Crown?
A crown is an artificial restoration that fits over the remaining part of a prepared tooth, making it strong and giving it the shape of a natural tooth. A sometimes is known as a ‘cap’.
Why do you need a crown?
Crowns are an ideal restoration for teeth that have been broken, or have been weakened by decay or a very large filling. A crown could be used for many other reasons, for instance:
- You may have discoloured fillings and would like to improve the appearance of the tooth
- You may have had a root canal which may need a crown to protect what is left of the tooth
- It may help hold a bridge or denture firmly in place
What is a crown made of?
Crowns can be made of a variety of different materials and new materials are continually being introduced. Some of the most popular options are listed below:
Porcelain bonded to precious or non-precious metal: this is what most crowns are made from. A precious or non-precious metal base is made and then porcelain is applied in layers over it.
Porcelain crowns: these crowns are made entirely out of porcelain and are not as strong as bonded crowns, but they can look very natural and are most often used for front teeth.
All-ceramic crowns: this modern technique offers a metal-free alternative, which can give the strength of a bonded crown and the appearance of a porcelain crown. Therefore, it is suitable for use in all areas of the mouth.
How is a crown prepared?
The dentist will prepare the tooth to the ideal shape for the crown. This will involve removing most of the outer surface, and leaving a strong inner core. The amount of the tooth removed will be the same as the thickness of the crown. Once the tooth is shaped, the dentist will take an impression (mould) if the prepared tooth, one of the opposite jaw and possibly another to mark the way you bite together.
The impressions will then be given to the dental technician, along with an appropriate shade and other information needed for the crown to be made.
What will happen between visits?
A temporary crown will be made so that you can use the tooth while you wait for the crown to made. This crown may be more noticeable but is only a temporary measure
How is the crown fitted?
When you and your dentist are happy with the fit and appearance of the new crown it will be fixed in place with special dental cement or adhesive. The cement forms a seal to hold the crown in place.
How long does the treatment take?
You will need to have at least two visits the first for the preparation, impression, shade taking and fitting the temporary crown and the second to fit the permanent crown. There will usually be about 1 to 2 weeks in between appointments.
Does it hurt to have a tooth prepared for a crown?
No, you will have a local anaesthetic and the preparation should feel no different from a filling. If the tooth does not have a nerve, and a post crown is being prepared, then you may not need a local anaesthetic.
Will the crown be noticeable?
The crown will be made to match your teeth as closely as possible. The shade of the neighbouring teeth will be recorded, to make sure that the colour looks natural and matches the surrounding teeth.
Will the crown feel different?
Because the shape of the crown will be slightly different from the shape of your tooth before, you may be aware of it to begin with. Within a few days it should feel fine, and you will not notice it. The crown may need some adjustment if your bite does not feel comfortable and if this is the case you should ask your dentist to check and adjust it.
How do I care for my crown?
How long you crown lasts depends on how well you look after it. The crown itself cannot decay, but decay can start where the edge of the crown joins the tooth. Therefore, to prevent decay affecting the crown, it is important to keep this area just as clean as you would your natural teeth. Brush for two minutes twice a day with a fluoride toothpaste and clean in between your teeth with interdental brushes or floss.
How long will the crown last?
Properly cared for crowns should last for years. Your dentist will be able to tell you how long the crown may be expected to last.
What will it cost?