Tooth fillings are designed to protect teeth that have been damaged by decay, but like anything else, they don’t last forever. Over the years, fillings can wear down, loosen, or even crack. While this isn’t always something you’ll notice immediately, it can cause problems if left untreated.
If you’ve had the same fillings for a long time, you might be wondering whether they’re still doing their job properly. Not sure? It’s always a good idea to book an appointment with your dentist for advice. In this guide, we look at how fillings change over time, the signs they may need replacing, and when it’s worth speaking to your dentist for peace of mind.
Why do tooth fillings not last forever
Although fillings are made from strong materials, they face daily pressure from chewing, grinding and temperature changes from hot and cold foods. Over time, this natural wear and tear can cause tiny gaps or leaks around the edges of the filling.
When this happens, bacteria can find their way underneath, leading to further decay. Even the most carefully placed tooth fillings aren’t immune to these changes, which is why dentists keep an eye on them at your dental check-ups.
Signs your old fillings may need replacing
Sometimes, a worn filling causes no obvious symptoms, which makes regular dental appointments important. But there are some changes you may notice at home that could suggest a problem:
- Increased sensitivity – if a tooth feels more sensitive to hot, cold or sweet foods than it used to, it could be a sign the filling is no longer sealing properly.
- Pain or discomfort – a dull ache, sharp twinge, or pain when biting down can indicate that the tooth or filling has weakened.
- Visible changes – dark lines, cracks or the filling appearing worn down are all signs it may need attention.
- Food trapping – if food keeps catching around the tooth, it may suggest a gap has formed.
Even if symptoms seem small, it’s best not to ignore them. Acting early often means the treatment is simpler and more comfortable.
When to see your dentist about old tooth fillings
If you’ve noticed any of the symptoms above, or it has simply been a long time since your fillings were checked, it’s sensible to book an appointment. A dentist can examine your teeth closely and use X-rays if needed to see what’s happening beneath the tooth’s surface.
Not every old filling needs replacing, but if one is leaking, cracked, or showing signs of wear, your dentist may recommend renewing it to prevent problems later. In some cases, a filling might just need smoothing or reshaping, while more worn teeth may benefit from additional support, such as a crown.
How long do tooth fillings usually last?
The lifespan of a filling depends on the material used, your lifestyle and how well you care for your teeth. Amalgam (silver) fillings are known for their durability and can last well over a decade, while composite (tooth-coloured) fillings usually last a little less, though many can perform very well with good care.
Think of them as a protective shield. They’ll protect your teeth for many years, but like all dental work, they may eventually need replacing.
Looking after your tooth fillings
Looking after your fillings isn’t very different from looking after your natural teeth, but the small extra effort pays off. Daily brushing and flossing keeps plaque away and prevents decay around the edges of your fillings. Cutting back on sugary and acidic food and drink helps protect both your enamel and your dental work. If you know you grind your teeth at night, a mouthguard can help reduce pressure and protect your tooth fillings from early wear.
Regular check-ups and hygiene appointments also play an important role. They give your dentist the chance to monitor how your fillings are holding up and catch any problems before they become more severe or painful.
Replacing tooth fillings for long-term peace of mind
Old fillings don’t always cause immediate problems, but leaving them unchecked can risk further decay and damage. If you’ve noticed changes in your teeth, or you simply can’t remember when your fillings were last checked, booking a dental appointment is a sensible step.
At Staina House Dental Practice, we’re here to make sure your smile stays strong and comfortable. Whether your tooth fillings are brand new or on the older side, we’ll give you clear advice on whether they need replacing and help you choose the right treatment to keep your teeth protected for years to come. Get in touch today by calling us on 01995 605707 or using our contact form here.
