05 Jun How Long Do Dental Fillings Last?
Dental fillings can last for many years, but they do not last forever. A filling sits in a warm, wet mouth every day, dealing with chewing pressure, bacteria, temperature changes and normal wear. Over time, it can chip, crack, loosen or develop decay around the edges.
So, how long do dental fillings last? Answers vary depending on factors such as the type of material used, its size, location in the mouth, how you bite, how often you clean your teeth, and whether or not your teeth are ground. According to a general rule, composite fillings will last 12-15 years with proper care, and amalgam fillings up to 20. Bupa notes that depending on the material used and specific factors for each tooth, inlays and/or onlays may last up to twenty years.
What is Dental Filling?
Fillings can be used to restore teeth damaged by decay, wear or minor fractures. The dentist can restore a tooth’s shape, strength and function. Fillings can be used to repair minor chips and wear, as well as cavities.
How long do different fillings last?
Different materials have different lifespans. No filling material is perfect for every tooth, so your dentist will recommend the best option based on the location, size and pressure on the tooth.
(i) Composite fillings are tooth-coloured and popular because they blend with your natural teeth. They are often used on front teeth and visible areas, but they are also used on back teeth in many cases. Bupa says composite fillings can last around 12 to 15 years with good care.
(ii) Amalgam fillings are silver-coloured and very hard-wearing. They have been used for many years, especially on back teeth where chewing pressure is high. Bupa says amalgam fillings can last up to 20 years.
(iii) Glass ionomer fillings are sometimes used for children’s teeth, root surfaces or areas with lower biting pressure. They are useful in certain situations but usually do not last as long as composite or amalgam.
(iv) Ceramic or porcelain inlays and onlays are lab-made restorations used when a tooth needs more support than a normal filling but may not need a full crown. Depending on the material, Bupa says inlays and overlays can have a lifespan of up to 20 years.
Why some fillings last longer than others
The material matters, but it is not the only factor. A small filling on a front tooth may last very differently from a large filling on a back molar. Back teeth take heavy chewing forces every day, so fillings there often deal with more stress. The size of the filling is also important. A small filling surrounded by strong tooth structure usually lasts longer. A very large filling has less natural tooth supporting it, which means the tooth may be more likely to crack later.
Your habits matter too. Teeth grinding, clenching, chewing ice, biting nails, opening packaging with teeth, or eating lots of hard and sticky foods can shorten the life of a filling. Oral hygiene is another major factor. Even if the filling itself is strong, decay can start around the edges if plaque is not removed properly. Sussex Community NHS notes that most fillings will need replacing at some time, and regular check-ups help dentists identify fillings that are deteriorating.
Signs your filling may need replacing
A filling does not always fall out dramatically when it fails. Sometimes the signs are subtle. You may notice sensitivity to cold, heat or sweet foods. Food may keep getting trapped around the filling. The tooth may feel rough or sharp when your tongue touches it. You might see a crack, chip, dark line or gap around the filling.
Pain when biting can also be a warning sign. It may mean the filling is high, cracked, loose, or that the tooth underneath has developed a problem. Avoid chewing the side of a tooth that has a completely fallen out filling until you have seen a dentist. Missing fillings can expose the tooth and cause sensitivity or decay.
Can a filling last a lifetime?
Some fillings are very durable, especially when they are small and placed correctly. Fillings are more likely to last a long time if they are small, well-placed and properly cared for. Your mouth is constantly changing. Teeth wear, gums change, bite forces shift, and old fillings weaken over time. Even the best filling may eventually need replacing or upgrading to a crown, inlay or onlay if the tooth needs more support.
How to make dental fillings last longer
The best way to protect a filling is to protect the tooth around it. Brush twice a day with fluoride toothpaste, clean between your teeth daily, and reduce how often you have sugary snacks and drinks. Sugar frequency matters because every sugar attack gives bacteria a chance to produce acid around the teeth.
(i) Regular check-ups are also important. Your dentist can spot cracks, leakage or early decay around a filling before you feel pain. This can prevent a small repair from becoming a bigger treatment.
(ii) If you grind your teeth at night, ask your dentist about a mouthguard. Grinding can put heavy pressure on fillings and natural teeth.
(iii) Avoid using your teeth as tools.This sounds simple, but biting pens, tearing labels, or cracking hard foods can damage both fillings and enamel.
What will happen when you fill in a replacement?
The old filling will be removed by the dentist to examine the tooth underneath.If there is more damage, the dentist may discuss a different option, such as an inlay, onlay or crown. Sometimes replacing a filling is straightforward. Other times, the old filling has hidden decay underneath, which means the treatment may be more involved. This is another reason not to wait until pain appears.
Salisbury services
In Salisbury, dental practices can help with routine filling checks, new fillings, replacement fillings, hygiene visits and treatment planning for weakened teeth. If you have sensitivity, a chipped filling, food trapping or pain when biting, a Salisbury dentist can examine the tooth, take X-rays if needed, and advise whether the filling can be repaired, replaced or upgraded to a stronger restoration. Local patients can also use routine check-ups to monitor older fillings before they become uncomfortable.
Final thoughts
The expected life of dental fillings depends on the type of material used, its size, how it’s placed, and the way you take care of your teeth. Composite fillings last 12 to 15 years, while amalgam fillings last 20 years if they are well cared for.
The most important thing is not to ignore changes. If a filling feels rough, loose, sensitive or painful, get it checked. A small repair at the right time can help protect the tooth and avoid more complex treatment later.
FAQs
How long do dental fillings last on average?
Many fillings last several years. Bupa says amalgam fillings can last up to 20 years, while composite fillings can last around 12 to 15 years with good care.
Do white fillings last as long as silver fillings?
White composite fillings may last a long time, but silver amalgam is often stronger, particularly on the back teeth. Composite fillings can last between 12 and 15 years while amalgam fillings can last for up to 20 years.
How do I know if my filling needs replacing?
Warning signs include sensitivity, pain when biting, food trapping, cracks, chips, rough edges, dark lines around the filling or a filling that feels loose.
Can decay happen under a filling?
Yes. Decay can develop around the edges of a filling if plaque builds up or the filling starts to leak. Regular check-ups help spot this early.
What makes fillings fail faster?
Large fillings, heavy biting pressure, teeth grinding, poor oral hygiene, frequent sugar intake and chewing hard or sticky foods can shorten filling lifespan.
Should I replace old fillings if they do not hurt?
Not always. Old fillings only need replacing if they are cracked, leaking, loose, worn or have decay around them. Your dentist can check this during a routine appointment.
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