Cosmetic Dentistry - Fillings
When you go for a check up, your dentist checks your fillings and may suggest that you replace any loose or broken ones. Your dentist also looks for signs of decay, such as brown or black spots and may want to use X-rays to take a close look at problems spots.
If you have a cavity, your dentist may keep an eye on it (if it’s small) or fill it right away. If a large cavity is not filled, it can get bigger and cause pain. The tooth may even have to be removed and replaced with a false (or artificial) tooth.
Overview
Your dentist cares about you and your oral health. If you have any questions or concerns about fillings, talk to your dentist. He or she will advise you on the type of filling that works best in your particular case, and inform you about the aesthetic and cost implications for each type.
Before you get a filling, tell your dentist about changes to your health since your last visit:
- Are you taking medicines?
- Do you have allergies?
- Are you pregnant?
There are several different types of fillings that can be used to fill a cavity, before a final decision on which type of filling is placed in your mouth is yours alone.
Metal Fillings
Dental Amalgam Fillings:
Dental amalgam fillings are sometimes called "silver" fillings. They still a common type of filling used in Canada today, but if conditions allow it is preferable to use a white filling material or a lab processed filling. Because these fillings are silver color, they are used to fill back teeth. They are a mix of metals such as mercury, silver, copper and tin.
Advantages
- These fillings are the least expensive type of filling.
- They last a long time.
- They are easy to put in place, because they are a direct filling, one visit your dentist will do the job, in most cases.
Disadvantages
- The silver color may not appeal to people who want a "natural" look.
- Tiny amounts of mercury are released from the filling when you chew. For most people, this bit of mercury is nothing to worry about. Studies have shown that amalgam fillings do not cause illness. They have been used on people for more than 150 years.
- Health Canada advises pregnant women in need of a filling to wait until the baby is born before they go ahead with the procedure. Your dentist can suggest other kinds of fillings, if the work is urgent.
Cast Gold Fillings:
Cast gold fillings are based on a model (or cast) of your tooth. Cast gold fillings are a mixture of gold with other materials such as silver and copper. These other metals make gold fillings more durable.
A cast gold filling is made in a dental lab and sent back to your dentist, who cements it in place in your mouth. You will need at least two visits to the dentist to get the job done. During the first visit, your dentist cleans out all the decay and makes a mould of your tooth. The hole is filled with a temporary filling.
Meanwhile, in a dental lab, the mould of your tooth is used to make a model of the filling that is the same size and shape as your tooth is built, based on the model. When you go back to the dentist a couple weeks later, the gold filling is cemented in place.
Advantages
- Gold is stronger than amalgam
- Gold fillings last a long time.
Disadvantages
- Gold costs more than other kinds of fillings.
- Gold fillings and crowns are indirect fillings, so they require at least two appointments.
- The gold color may not appeal to people who want a "natural" look.
Tooth-Colored Fillings
Composite Fillings:
Composite fillings are also called plastic or white fillings. Getting this kind of filling depends on where the tooth is in your mouth. We bite down hard on our back teeth (molars), so a plastic filling may not be a good choice. Talk to your dentist about other options.
To place this filling, your dentist cleans all decay from the tooth and puts a glue (or bonding material) on the inside of the hole. Composite resin is put into the hole in thin layers. Each layer gets hard with the help of a special light that your dentist holds over the tooth. When the last layer of the filling is hard, your dentist shapes the filling so it looks and feel natural.
Advantages
- These fillings will be the same color as your natural teeth.
- They cost less than gold fillings.
- They are direct fillings, so they can be done in one appointment, in most cases.
Disadvantages
- This kind of filling can break more easily than amalgam or gold fillings and may not last as long.
- Composite fillings cost more than amalgam fillings.
- Recurrent decay is more of a problem than with amalgam or gold fillings.
Glass Ionomer Materials:
Glass ionomer materials are only used in teeth where you do not bite down hard. There have not been many studies about how long this kind of filling lasts. Newer forms of the filling may be stronger and last longer. Research is underway to evaluate the effectiveness of these materials.
Advantages
- These fillings are the same color as your natural teeth.
- They contain fluoride, which helps stop recurrent decay in the tooth.
- They do not have to be put in layer by layer: thus, they are simpler to put in than composite resins.
- They are direct fillings and can be done in one appointment, in most cases.
- They cost less than gold fillings.
Disadvantages
- They are not as strong and will not last as long as other fillings.
- They cost more than amalgam fillings.
Porcelain Materials:
Porcelain materials are the most common types of dental ceramic used by dentists. They are hard and brittle. Porcelain and metal can be combined to make a very strong tooth-colored crown.
Dental porcelain is made in a dental lab. Unless you have a bad tooth-grinding habit or some other problem, a combination of porcelain and metal can be used anywhere in the mouth.
Advantages
- Dental porcelain is the same color as natural teeth.
- These fillings last a long time.
Disadvantages
- For teeth that bite down hard like molars, ceramics are not a good choice. Fillings can break.
- They are indirect fillings, so at least two appointments will be needed.
- They cost more than most other types of fillings.
How Fillings Are Done
To fill a cavity, your dentist may first give you "freezing" (or local anesthetic), so you do not feel any pain. Your dentist then takes out all traces of decay, shapes the hole and fills it. Most fillings are done in two ways:
1. Direct Filling
These fillings go right into the cavity, after your dentist cleaned out the decay. Amalgam (or silver) fillings and plastic (or white) fillings are examples of direct fillings. They harden quickly. Most of the time, you will be able to have a direct filling put in place in one appointment.
2. Indirect Filling
Examples of this type of filling are crowns (or caps) and inlays. They are custom made in a lab to fit your tooth. Your dentist cements the filling in place. Most indirect fillings take two or more appointments to complete.
Dental amalgam is the best-known direct material. Cast gold alloy is the most durable indirect material. However, ceramics are gaining in popularity because of their longevity relative to other tooth-colored materials.
Remember, your dentist is interested in you and your oral health. If you are concerned about having any particular dental restorative materials placed in your teeth, talk to your dentist and be a partner in decisions about your oral health care.
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Cosmetic Dentistry | Bonding & Veneers | Crowns | Bridges & Dentures | Fillings
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