Depending on their size and position on the tooth, fillings can last for many years. Since they are made of an artificial material that gradually wears down during chewing, every filling will eventually need to be replaced at some point in life. Replacing old fillings is done for several reasons, and in this text, we will explain the most common ones.
Replacement of Old Fillings That Are Cracked
As mentioned earlier, fillings endure significant chewing forces. Over time, they may crack if the material is thin or of lower quality. Cracking can also occur if decay develops beneath the filling.
When Should You Visit a Dentist?
If you notice that your filling is cracked or that a piece has fallen out, you should visit your dentist for an examination and replacement. Leaving this issue untreated can lead to food accumulation, the development of decay, and eventually sensitivity or pain.
Worn-Out Fillings Without Cracks
Another issue occurs when a filling becomes worn down. In this case, no part of the filling has cracked or fallen out; the filling has simply thinned evenly over time. This happens in people with strong bite forces or those with thin fillings. Patients often seek dental help because they experience discomfort while eating. Even though this issue does not necessarily involve decay, the filling must be replaced due to the symptoms.
Replacement of Old Fillings Due to Recurrent Decay
Even if a tooth already has a filling, it can still develop decay later in life. This may happen due to improper hygiene or a poorly adapted filling placed initially.
What Is Secondary Decay?
This type of decay is called secondary caries, and it may appear with or without symptoms. It can develop even when the patient feels no discomfort at all. This is why regular dental check-ups are crucial—to detect the problem early and prevent deep decay or inflammation of the tooth nerve.
Changing a Filling for Esthetic Reasons
White (composite) fillings evolve rapidly, and each year we have access to better materials. However, because of habits such as smoking, coffee consumption, other dark beverages, or poor oral hygiene, even high-quality fillings can change color over time and become darker.
When Should a Filling Be Replaced for Esthetics?
In such cases, the decision is made between the dentist and the patient. If the darkened filling is still physically strong, the patient may choose to replace it solely for esthetic reasons. However, if the filling is no longer good aesthetically or structurally, it must be replaced.
Changing Fillings After Teeth Whitening
For patients undergoing teeth whitening, fillings in the visible smile zone will create an esthetic mismatch afterward. Whitening does not affect fillings, so 10 days after the procedure, the visible fillings should be replaced to match the new tooth shade.
Replacement of Old Metal Fillings
There are differing opinions regarding the replacement of metal (silver, amalgam) fillings. Some people believe they should all be removed because they do not want metal in their mouths, while others follow scientific guidelines stating that these fillings are safe.
When Is Replacing a Metal Filling Necessary?
Regardless of which group you belong to, one thing is certain—if a metal filling no longer fits well on the tooth and has marginal defects, it must be replaced.
Safe Removal of Metal Fillings
For patients who prefer to avoid exposure to metal particles during removal, there is a safe technique for taking these fillings out. This is done using a protective rubber dam.
If you have metal fillings that show when you smile and bother you aesthetically, they can be replaced with white (composite) fillings.
Why Regular Check-Ups Matter
If you have not visited your dentist for a long time, we recommend scheduling a check-up. Even without symptoms, one of your old fillings may be in poor condition and require replacement to prevent further issues.
