Over time, dental fillings—especially older amalgam ones—can weaken, crack, or even fall out. Knowing when to replace them is key to maintaining good oral health and avoiding more extensive treatment.
Why Fillings Need to Be Replaced
- Wear and tear – Constant chewing and temperature changes can cause fillings to break down.
- Leaks and gaps – Gaps between the tooth and filling can allow bacteria in, leading to new decay underneath.
- Cracks or fractures – Older fillings may crack, putting the surrounding tooth at risk.
- Aesthetic reasons – Many people choose to replace silver fillings with tooth-coloured ones for a more natural look.
Signs Your Filling May Need Replacing
- Tooth sensitivity or pain
- Noticeable cracks or wear on the filling
- A loose or fallen-out filling
- Discolouration or staining around the filling
What Your Dentist Will Do
During your regular check-up, your dentist will assess your existing fillings. If replacement is needed, they’ll remove the old material, clean the cavity, and place a new filling—often using composite resin for a more discreet result.
Preventing the Need for Fillings
While fillings are a common and effective treatment, the best outcome is avoiding them altogether. Prevention is the most reliable way to keep your natural teeth strong and cavity-free.
Tips to Reduce Your Risk of Cavities
- Brush twice a day with fluoride toothpaste
- Floss daily to remove plaque between teeth
- Avoid frequent snacking on sugary or starchy foods
- Drink water throughout the day, especially after eating
- Visit your dentist every 6–12 months for a check-up and clean
Fluoride Treatments and Fissure Sealants
- Fluoride helps strengthen enamel and can reverse early decay.
- Fissure sealants are protective coatings applied to the grooves of back teeth, commonly used for children but also helpful for adults with deep grooves.