What is a Dental Crown?
A crown is a fixed unit that that replaces the lost portion of the tooth which is visible in the mouth. They are used to restore a broken, weakened or heavily filled tooth. They are also used to improve the appearance of discoloured or crooked teeth although this option is more destructive than a veneer or direct bonding. Crowns may be made of different materials such as pure metals or porcelain (which is tooth coloured) or a mixture of both.
Once the tooth has been prepared, an impression is taken by the dentist, which is then sent to the laboratory for the crown to be made. This usually takes about 1 week, and during this time the dentist will place a temporary crown to protect the tooth.
What are the chances of success?
A crown should easily last 10+ years if you look after it. As it is a mechanical prostheses fitted in the mouth, it requires regular care & maintenance by both dentist & patient to ensure success. There are some recent studies that have shown that teeth prepared for crowns have a 20% chance of dying off (pulp death) within 10 years.
What are the benefits?
A crown is strong and can look and feel exactly like a natural tooth. The colour and shape can be matched to your own teeth. A badly broken down tooth can be fully restored and functioning again with a crown.
My Crown is going dark at the margin, why is this?
Often crowns that have metal under the porcelain can start to show a dark band where the crown meets the gum. This can be very unpleasant looking and often is the most common reason for the crown being replaced.
The reason this happens is due to a number of potential factors:
1. The gum can recede and shrink that exposes this dark margin of metal under the porcelain.
2. The gum can recede and expose some of the root of the tooth which is often very dark.
3. Some of the porcelain may have chipped away exposing the metal.
These are the most common reasons but to find out what has happened to your crowns book a free consultation.
Can I have my crowns replaced?
The dentist will first need to check with a dental x-ray the state of the tooth underneath and check to make sure that changing the crown will be safe and that the root is in a good condition.
Dental Bridges can be used to fill a space or gap in your mouth as long as you have a healthy natural tooth of your own that can be used to hold the bridge in place.
There are two common types of bridges:
Conventional Bridge – The false tooth (to fill the space) is attached to one or more of your natural teeth using a dental crown. The crown is placed over your natural tooth. This option is strong and tend to last for approximately 10 years however this option is destructive as the natural tooth has to be reduced in size to make space for the crown. The problem with this is that by cutting the tooth to make it smaller the nerve of the tooth can die which may lead to an abcess forming. This happens in approximately 5% of teeth that have a crown placed within 10 years.
Adhesive Bridge – The false tooth (to fill the space) is attached to one of your natural teeth using a thin metal wing. The metal wing is cemented to the back of one of your natural teeth. This method often does not involve any natural tooth removal and therefore is a safer option however because the bridge is held on only by a thin metal wing, they are more likely to debond and come off.
How will I know If I am Suitable for a Bridge?
You can arrange a free consultation to discuss your options of a bridge with one of our cosmetic dentists.
A dental x-ray is required normally to assess the health of the teeth either side of the space that you want replaced as the bridge will hve to be held on by one or both of the teeth.
I don’t like the look of my Dental Bridge, can I have it replaced?
Yes you can. Here at Maison Dental focus on cosmetic enhancements and smile makeovers.