What is a filling?
A filling is a material that is used to restore functional and lasting structure to a tooth that has been disfigured by, for example decay or accidental breakage.
How do I know if I need a filling?
You may not know if you need fillings in your teeth. Many small to medium holes in teeth are asymptomatic, giving no pain. In fact, decay can sometimes eat out two-thirds of the tooth from the inside and you would have no idea it is happening.
Dental radiographs (X-rays), which are taken on a regular basis as part of your check-up, may show early decay that has not yet given any symptoms. You may be able to see a change in the colour on some of your teeth which may indicate early decay. If your teeth are sensitive to hot, cold, or sweet food and drink, you may need fillings.
All persistently sensitive teeth should be checked by your dentist. Toothache that lasts for more than a few minutes at a time should be investigated by your dentist. Teeth that cause severe pain may require fillings, or in some cases will require more extensive treatment such as root canal treatment.
What are fillings made of?
Most modern fillings are made of dental composite (tooth coloured fillings), which consists of a resin matrix with filler particles. The resin is the liquid component that hardens with time by chemical reaction. The filler particles are made from solid substances such as glass or pieces of set resin.
How long do fillings last?
The position, shape, material, and functioning pressure, all influence how long dental fillings will last. Larger fillings that bear a heavy functional load tend to break down more quickly than smaller fillings that bear little force. This is why it is impossible and meaningless to try to state categorically how long fillings should last.
However, when placing a filling, the dentist may have an idea of the expectation of the life of the filling. For example, a very small filling in the groove of a tooth away from biting pressure could be there for decades whereas a very large one in the mouth of a person who grinds their teeth may be lucky to last a few years and really should have a crown or onlay. In a checkup, your dentist is constantly monitoring the state of your fillings, looking for signs of weakness, cracking, decay or discolouration.
Can all teeth be filled with fillings?
Most teeth with small to moderate decay or fractures are easily restored to function with fillings. Where decay is extensive or fractures are large, more complex treatment may be required. Some teeth can be so badly broken down or fractured that they are unable to be saved.
Should baby teeth have fillings?
Yes, if decay is present then baby teeth should be filled to prevent toothaches, to maintain the baby teeth for eating, and to hold the right amount of space for the adult teeth. If the baby teeth are going to be exfoliated (fall out) soon, then it is not always necessary to fill the teeth. This should be discussed with your dentist.