If you’ve had silver amalgam fillings for years and you’re wondering whether they can be swapped for white ones, the answer is usually yes, but it’s worth understanding what the process actually involves before booking in.
Replacing old amalgam with white composite is one of the more common requests we receive at practices like ours, and for many patients it’s a straightforward procedure. But there are things to consider before deciding it’s the right step. If you’re thinking about dental fillings in Dreghorn, here’s what you need to know.
Why Patients Ask About Replacement
The reasons people want their amalgam removed tend to fall into a few categories. Aesthetics is the most common: older silver fillings darken over time and can make teeth look grey, particularly the teeth visible when smiling or speaking. Some patients also have concerns about the mercury content of amalgam, though the clinical evidence consistently shows that amalgam fillings in stable condition pose no significant health risk for most adults.
A third reason, and one that’s worth taking seriously, is structural. Older, large amalgam restorations sometimes show cracks in the surrounding tooth or failing margins that allow decay to develop underneath. In these cases, replacement isn’t just cosmetic; it’s genuinely necessary.
When Replacement Makes Clinical Sense
Not every old amalgam filling needs replacing. In our experience, a filling that’s sound, properly sealed, and causing no symptoms is often best left alone. Removing an amalgam filling that’s functioning well means unnecessary removal of tooth structure and a period of post-operative sensitivity that could have been avoided entirely.
Replacement is genuinely indicated when:
- The filling has cracks, fractures, or gaps at the margin allowing bacteria in
- Decay is developing beneath or around the existing filling
- The filling is causing the surrounding tooth to fracture (cusp fractures around large amalgams are common)
- The patient has a confirmed allergy to a component of amalgam (rare, but it occurs)
- The tooth needs a new restoration for an unrelated reason anyway
Elective replacement purely for cosmetic reasons is also entirely valid, but it’s honest to acknowledge that it involves drilling into a tooth that may currently be functioning well. That’s a choice each patient should make with full information, not because of anxious pressure from a practice keen to upsell treatment.
What the Procedure Involves
Replacing an amalgam filling with composite involves removing the old material first. This is done with a dental drill under local anaesthetic, and it takes slightly longer than a new filling appointment because the old material must be broken down and removed carefully. The tooth is then assessed: if there’s any decay underneath the old filling (which there sometimes is), that’s addressed before the composite is placed.
There’s one thing worth flagging. During the removal of amalgam, small amounts of mercury vapour are released. In most clinical settings, this is managed with high-volume suction and good ventilation. If this is a concern for you, it’s entirely reasonable to ask your dentist what precautions they take during amalgam removal.
Composite vs Amalgam After Replacement: A Comparison
| Consideration | After Composite Replacement | Keeping Existing Amalgam |
|---|---|---|
| Appearance | Tooth-coloured, natural-looking | Silver or darkened grey |
| Tooth structure | Some additional tooth removed to place composite | No additional removal |
| Mercury exposure during work | Brief exposure during amalgam removal | None |
| Post-procedure sensitivity | Possible for 1 to 2 weeks | Not applicable |
| Long-term risk | New composite can chip or wear over time | Risk of cusp fracture from thermal stress |
| Cost | Private treatment; typically £80 to £200 per tooth | No cost if leaving in place |
NHS Versus Private in Scotland
Under NHS Scotland, amalgam is the funded option for back teeth in adult patients aged 26 and over. Replacing a sound amalgam with white composite on a back tooth is therefore a private procedure, not an NHS one. Adults over 26 pay 80% of NHS treatment costs, capped at £384 per course of treatment. Free treatment is available for patients under 26, and examinations are free for everyone in Scotland. For full NHS dental charges information, NHS Inform’s page on receiving NHS dental treatment sets out the details clearly.
If a back-tooth amalgam genuinely needs replacement on clinical grounds, your dentist can advise whether any element is covered under NHS treatment or whether it will be entirely private.
What to Expect in Terms of Results
We had a patient come in recently who’d had large amalgam fillings in both lower second premolars for over fifteen years. Both were still technically functional, but the teeth had developed a greying discolouration from the amalgam showing through the thin enamel walls. She’d been self-conscious about it for years. We replaced both over two appointments. The shade matching was precise, the fillings were invisible in normal conversation, and she mentioned at her next check-up that she’d stopped avoiding smiling in photos.
Actually, the aesthetic result surprised her more than she expected, because she’d assumed the teeth would still look slightly different. With well-matched composite, that’s generally not the case. If you have old amalgam fillings that you’d like reassessed, whether for clinical or cosmetic reasons, the right first step is simply to ask your dentist to review them. Not everything needs replacing, and a good clinician won’t recommend treatment that isn’t warranted.
At StormDental in Dreghorn, we’re happy to assess your existing restorations and give you an honest opinion on whether replacement is clinically necessary, cosmetically worthwhile, or better left alone. Call us on 01294 218733 to book a review.
