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Crowns are an ideal way to rebuild teeth which have been broken, or have been weakened by decay or a very large filling. The crown fits right over the remaining part of the tooth,making it strong and giving it the shapes and contour of the natural tooth. Crowns sometimes are also known as ‘caps’.
There are a numbers of reasons. For instance: the tooth may have been weakend by having a vary large filling, you may have discoloured fillings and would like to improve the appearance of the tooth, you may have had a root canal filling which will need a crown to protect It, you may have had an accident and damaged the tooth, it may help hold a bridge or denture firmly in place.
Crowns are made of a variey of materials and new materials are being introduced all the time. Some of the options available at present:
Porcelain bonded to precious metal – this is what most crowns are made from.
A precious metal base is made and layers of porcelain are then applied over it.
Porcelain: These crowns are not as strong as bonded crowns but they can look very natural and are most often used for front teeth .
Porcelain and composite: Porcelain and composite resin materials can sometimes look the most natural. However, these crowns are not as strong as bonded metal crowns.
Precious metal: These crowns are very strong and hard – wearing , but are not usually use on the front teeth
Metal-ceramic crowns (nickel free alloy)
Porcelain fused to metal crowns and bridges.
Full ceramic crowns and bridges.
Zirconia-ceramic crowns.
Zirconia–ceramic crowns on dental implants.
Full ceramic / porcelain veneers (ceramic shells).
The dentist will prepare the tooth to the ideal shape to receive a crown. This means removing a bit 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 to be fitted. Once the tooth is shaped, the dentist will take an impression of the prepared tooth, one of the opposite jaw and possibly another to mark the way you bite together. The imperssions will be given to the laboratory technicians along with any other information they need to make the crown.
The impression and information about the shade of your teeth will be given to a dental technician who will be skilled in making crowns. They will make models of your mouth and make the crown on these to be sure that the crown fits perfectly.
No. The crown will be made to match your other teeth exactly. The shade of the neighbouring teeth will be recorded, to make sure that the colour looks natural and matches the surrounding teeth. A temperory crown, usually is made in plastic, will be fitted at the end of the first appointment to last until the permanent one is ready. These temperory crowns may be more noticeable, but they are only in place for about two weeks.
You will need to have at least two to three visits: the first for the preparation, impression, shade matching and fitting the temperory crown, and the second for trial of shade, or metal coping. The third visit for fitting of the permanent crown.
You can choose between, lots of colors. Our dentist and dental technician can advise you to choose the best color for you.
No. A local anesthetic is used during the tooth preparation. If the tooth is root canal treated, it won’t be having a nerve, so a local anesthetic may not be required.
Post crowns may be used when the tooth has been root filled. The weakened crown of the tooth is drilled off at the level of the gum. The dentist makes a post to fit into the root canal system. This can be either prefabricated stainless steel or custom made up of gold. One end of the post is cemented into the root canal and the other end holds the crown firmly in place.
If a root–filled tooth is not completely broken down, it may be possible to built it up again using filling materials. This ‘core’ is than prepared in the same way as the natural tooth, and the impressions are taken.
The life of a crown depends on how well it is looked after. The crown itself cannot decay, but decay can start where the edge of the crown joins the tooth. It is very important to keep this area as clean as your other teeth, or decay could endanger the crown. Properly cared crowns and prosthesis will last for many years.
Once the fit and appearance of the crown has been checked- and approved by the patient- it will be cemented in place with special dental cement. The cement also forms a seal to hold it firmly in place.
Because the shape of the crown will be slightly different from the shape of the tooth before it was crowned, 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 it feels higher than the surrounding teeth.
For an anterior teeth a veneer may be an option, but for posterior tooth the dentist will evaluate the remaining tooth structure left after the root canal treatment and will decide upon which prosthesis will best suit to gain the maximum strength and coverage.
Restore clinic is a centre for Advanced Cosmetic surgery & Microendodontics. We offer full spectrum of Cosmetic surgery, non-surgical cosmetic procedures and dental treatment.