Composite fillings are tooth-coloured restorations used to repair cavities, chips, or cracks. Their lifespan depends on material quality, placement technique, oral hygiene, and chewing habits. On average, composite fillings last between 5 to 10 years, though some may last longer with proper care. Understanding how composite bonding work can help maintain fillings effectively.
People often consider longevity when choosing between composite and other types of fillings, especially for visible teeth or when using NHS dental services.
Factors That Affect the Longevity of Composite Fillings
Several factors influence how long a composite filling lasts:
- Oral hygiene: Brushing twice daily and flossing prevents decay around the filling.
- Diet: Sugary or acidic foods can weaken the filling over time.
- Chewing habits: Biting hard foods or grinding teeth may cause cracks or wear.
- Location of filling: Front teeth typically experience less force than molars, affecting durability.
Average Lifespan
Composite fillings generally last 5–10 years. Front teeth fillings may last closer to 10 years due to lower chewing pressure, while molar fillings may require replacement sooner. Routine dental check-ups help identify wear or damage early.
Signs a Composite Filling Needs Replacement
It may be time to replace a filling if you notice:
- Cracks or chips in the filling
- Sensitivity to hot, cold, or sweet foods
- Discolouration or staining around the filling
- Rough or uneven surface
If left untreated, a worn filling can lead to decay or further damage.
Maintenance Tips to Extend Lifespan
Maintaining composite fillings can prolong their effectiveness:
- Brush gently with a soft-bristled toothbrush
- Floss daily to prevent plaque build-up
- Avoid chewing hard objects like ice or pens
- Schedule regular dental exams
These steps also help prevent the need to remove stains from composite bonding at home or repair other cosmetic work.
Composite Fillings on NHS vs Private
On the NHS, composite fillings are generally used for front teeth or visible areas due to aesthetic preference. Private dental care may offer higher-quality materials or longer-lasting composites. Discuss options with your dentist to determine the best choice for your situation.
When a Filling Should Be Replaced
Replacement may be necessary if the filling fails, the tooth decays beneath it, or if cosmetic concerns arise. Dentists can safely remove old fillings and replace them with new composite material without damaging the natural tooth, similar to how bonding be removed.
Frequently Asked Questions
How long do composite fillings last on NHS?
Typically 5–7 years, depending on location, oral care, and wear.
Can composite fillings stain like bonding?
Yes, composite fillings can discolour over time, similar to how stains develop on bonded teeth.
Is replacement painful?
No, replacement is usually straightforward and often requires only local anaesthesia.
Can fillings crack?
Yes, biting hard foods or grinding teeth can crack composite fillings.
How can I make a filling last longer?
Good oral hygiene, avoiding hard foods, and regular dental check-ups are essential.
Are composite fillings as durable as amalgam?
Composite fillings are less durable under high chewing pressure but are preferred for aesthetic reasons.
Can old fillings be reused?
No, old composite fillings are removed and replaced with fresh material.
What happens if a filling fails?
Decay can spread, requiring replacement or more extensive treatment like a crown.
Author: Teeth Insider
Last Updated: January 2026