If you’ve ever sat in the dentist’s chair and been told you need a filling, you’ll know that slightly overwhelming feeling when the options start getting explained to you. Silver or white? Amalgam or composite? Which one actually lasts? And is one safer than the other?
You’re not alone in feeling confused; it’s one of the questions we get asked most at Kingfisher Dental.
What Are Teeth Amalgam Fillings?
Teeth amalgam, the silver-coloured filling you might remember from childhood, has actually been used in dentistry for well over 150 years. That’s not a typo. It’s one of the most tried and tested materials in the history of dental care, and there’s a good reason it’s stuck around.
Amalgam is made from a blend of metals - silver, tin, and copper - held together with a small amount of mercury that binds everything into a rock-solid compound. It sets hard, handles enormous biting pressure, and genuinely lasts. For back teeth that are doing the heavy lifting every time you eat, that matters a lot.
At Kingfisher Dental, we offer both medium and large teeth amalgam fillings, so whether you’ve got a small troublesome molar or a more significant cavity, we’ve got you covered.
To sum it up, teeth amalgam fillings are:
- Silver/grey in appearance
- Built to last - often 10 to 20 years or more
- Excellent value, especially for back teeth
- The go-to option for larger cavities under pressure
- One of the most clinically researched dental materials in existence
What Are White (Composite) Fillings?
White fillings, or composite fillings as they’re also known, are made from a resin and glass mixture that gets colour-matched to your natural tooth. Done well, you genuinely can’t tell they’re there. For a lot of patients, that’s the main appeal.
They’ve come a long way in recent years, too. Early composite fillings had a bit of a reputation for not lasting as long as amalgam, but modern materials are significantly more durable than they used to be. They’re a solid option, just with some differences worth knowing about.
To sum it up, white composite fillings are:
- Tooth-coloured and virtually invisible once placed
- Bonded directly to the tooth, so less drilling is often needed
- Great for front teeth and smaller cavities
- Slightly shorter-lived than amalgam in high-pressure areas
- Available at Kingfisher Dental in small, medium, and large sizes
Teeth Amalgam vs White Fillings: A Direct Comparison
Durability and Longevity
If you want a filling that’s genuinely going to go the distance, teeth amalgam is hard to beat. A well-placed amalgam filling in a back molar can last 10 to 20 years, sometimes even longer, even with daily chewing, grinding, and everything else your teeth put up with.
White composite fillings typically last around 5 to 10 years in back teeth. In lower-pressure spots like front teeth or small cavities, they perform really well, but for big restorations in hard-working molars, amalgam has the edge.
Best for longevity: Teeth amalgam fillings
Appearance
No contest here, white fillings win on looks. They’re matched to your tooth colour and blend in naturally. For any tooth that shows when you talk or smile, composite is almost always the better aesthetic choice.
Teeth amalgam fillings are silver-grey, so they are visible if someone looks closely enough. In back teeth, most people never notice them, but if knowing it’s there would bother you, that’s a perfectly valid reason to go composite.
Best for aesthetics: White composite fillings
Cost
Teeth amalgam fillings are the more affordable option, particularly for larger restorations where a lot of material is needed. We’re always upfront about pricing at Kingfisher Dental, and if you’re on our membership plan, you’ll also get discounts across most of our treatments, which helps keep costs manageable.
Best for value: Teeth amalgam fillings
Suitability for Different Teeth
Amalgam really comes into its own in the back of the mouth, molars and premolars, where the bite force is greatest. White fillings are the better choice for front teeth, visible areas, and smaller or medium-sized cavities.
When you come in for your appointment, we’ll always assess exactly where the cavity is and how big it is before recommending anything. It’s never one-size-fits-all.
Sensitivity After Treatment
Both types of filling can cause a bit of sensitivity for a few days after placement - totally normal, and it nearly always settles down on its own. Some patients find white fillings cause slightly less post-treatment sensitivity because they bond directly to the tooth, but everyone’s different. We’ll always let you know what to expect before you leave the chair.
Are Teeth Amalgam Fillings Safe? What the Evidence Says
This is the big one. If you’ve ever Googled amalgam fillings, you’ve probably come across some alarming headlines about mercury. So let’s talk about it properly.
Yes, teeth amalgam contains mercury, but the mercury in amalgam is chemically bound within the alloy and behaves very differently from the liquid mercury you might be picturing. It isn’t floating freely, and the trace amounts released during normal use are well below levels considered harmful. The NHS, the World Health Organisation, and the British Dental Association have all reviewed the evidence and consistently concluded that amalgam fillings are safe for most adults.
That said, there are some groups where we’d typically recommend an alternative:
- Pregnant or breastfeeding women
- Children under 15
- Anyone with a known allergy to mercury or other amalgam metals
- People with certain kidney conditions
It’s also worth mentioning that the UK is gradually phasing down the use of new amalgam placements as part of a global environmental agreement, not because existing fillings are dangerous, but as part of a broader effort to reduce mercury use across industries. If you’ve got old amalgam fillings that are in good shape, there’s no reason to worry about them.
We always go through your full medical history before recommending any treatment, so if you have concerns, just bring them up; we’re very happy to talk it through.
Should You Replace Your Old Amalgam Fillings?
Honestly? Probably not, at least not without a good reason.
If your teeth's amalgam fillings are doing their job, well-sealed, and not causing you any issues, removing them would do more harm than good. Taking out a perfectly healthy filling can damage the tooth structure around it, and we’d never put you through that unnecessarily.
Where replacement might genuinely make sense is if:
- The filling is cracked, worn, or starting to leak
- There’s a new decay forming underneath or around it
- It’s causing the tooth to crack
- You have a specific allergy or medical concern
- You’d simply prefer the look of a white filling, and the tooth is otherwise healthy
If you’re not sure whether any of your existing fillings need attention, a check-up is the best place to start. We’ll take a proper look and tell you honestly what we find - no upselling, no pressure.
Which Filling Is Right for You?
Here’s the short version if you’re still weighing it up:
Lean towards teeth amalgam if:
- It’s a back tooth with a large cavity
- Durability and cost are your biggest concerns
- You grind your teeth
- You want a material that’s been proven over generations
Lean towards white composite if:
- The tooth is visible when you smile or speak
- The cavity is small to medium
- A natural look matters to you
- You’d like to keep as much healthy tooth structure as possible
Still not sure? Come and talk to us. That’s genuinely what we’re here for.
Amalgam and White Fillings at Kingfisher Dental, Redditch
We’re a family-run dental practice in Redditch, and we’ve been looking after smiles in this community for over 20 years. Whether you need a straightforward teeth amalgam filling or a perfectly matched white composite, our team will make sure you’re comfortable, informed, and happy with your treatment every step of the way.
We see both NHS and private patients, and our membership plan is a great way to spread the cost of your dental care throughout the year, with discounts on most treatments built in.
Book Your Appointment at Kingfisher Dental Today
Got a niggling tooth? Due for a check-up? Just want some advice on your options? We’d love to hear from you.
We’re open Monday to Thursday 9 am–5:30 pm and Friday 9 am–5 pm, and if something has come up urgently, we do our best to see emergency cases on the same day.
.avif)
