What fillings don’t have mercury?
Dental fillings that don’t contain mercury include composite resin, ceramic (porcelain), glass ionomer, and gold fillings. These alternatives have become increasingly popular as patients seek safer, more aesthetically pleasing options to traditional amalgam restorations.
Do NHS Dental Fillings Contain Mercury?
NHS dental fillings can contain mercury, as amalgam (a mixture of metals including approximately 50% mercury) has historically been the standard material used in NHS dentistry due to its durability and low cost. However, the landscape has shifted considerably in recent years. Following a European Union directive and updated guidance from UK health authorities, the use of dental amalgam has been significantly restricted, particularly for children under 15, pregnant women, and people with kidney conditions.
As of July 2023, the UK government moved to phase down amalgam use further in line with the Minamata Convention on Mercury, an international treaty designed to protect human health and the environment. NHS dentists are now required to use amalgam-free alternatives in many circumstances, and patients can discuss their preferences with their dentist. You can find up-to-date guidance on amalgam restrictions via the UK Government’s guidance on dental amalgam.
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What Is the Safest Type of Dental Filling for Your Teeth?
| Filling Type | Material | Mercury Content | Typical Lifespan |
|---|---|---|---|
| Composite Resin | Plastic/glass mix | None | 5 to 10 years |
| Ceramic/Porcelain | Fired porcelain | None | 10 to 15 years |
| Glass Ionomer | Glass/acrylic | None | 3 to 7 years |
| Gold | Gold alloy | None | 15 to 25 years |
| Amalgam | Metal alloy | ~50% mercury | 10 to 15 years |
The safest type of dental filling, in terms of mercury exposure, is composite resin, which is made from a blend of plastic and fine glass particles and contains no mercury whatsoever. It bonds directly to the tooth structure, meaning less healthy tooth material needs to be removed during the procedure compared to amalgam, and it can be colour-matched to your natural teeth for a seamless finish.
Ceramic and porcelain fillings are another excellent option, particularly for larger restorations or patients with aesthetic concerns. They are highly durable, biocompatible, and resistant to staining, making them a preferred choice for many private patients and those seeking long-term results. Glass ionomer cement is often used for fillings in lower-stress areas and releases fluoride over time, offering an added layer of protection against further decay.
Comparing Mercury-Free Filling Materials
| Factor | Composite Resin | Ceramic | Glass Ionomer | Gold |
|---|---|---|---|---|
| Aesthetics | Excellent | Excellent | Good | Poor |
| Durability | Good | Very Good | Moderate | Excellent |
| Cost (NHS) | Band 2 | Private only | Band 2 | Private only |
| Mercury-Free | Yes | Yes | Yes | Yes |
| Fluoride Release | No | No | Yes | No |
Choosing between mercury-free filling options depends on several factors, including the location of the tooth, the size of the cavity, your budget, and personal preference. Composite resin is widely available on the NHS under Band 2 treatment (currently £65.20 in England) and is suitable for most small to medium cavities, particularly in visible areas of the mouth.
Gold fillings, while extremely durable and entirely mercury-free, are only available privately and can be considerably more expensive. They remain a popular choice for back teeth where strength is prioritised over appearance. Your dentist will help you weigh up the options based on your specific clinical needs and circumstances.
Can I Have an MRI with Amalgam Fillings?
One of the most common concerns patients raise is whether existing amalgam fillings are safe during an MRI scan. The good news is that amalgam fillings generally do not pose a significant risk during MRI procedures, as the metal components in amalgam are not strongly magnetic and are unlikely to move or cause harm in a magnetic field.
That said, amalgam fillings can occasionally cause image artefacts on MRI scans, particularly when imaging the head, jaw, or neck area, which may affect the clarity of results. Radiologists and MRI technicians are aware of this issue and will typically account for it. If you have concerns, it is always worth informing the MRI team about any dental work before your scan so they can adjust their approach accordingly.
Is It Worth Removing Mercury Fillings from Your Teeth?
This is a question many patients grapple with, especially those who have older amalgam restorations. The scientific consensus, supported by bodies such as the NHS and the Medicines and Healthcare products Regulatory Agency (MHRA), is that amalgam fillings in good condition pose a very low risk to health and that removing them unnecessarily can expose you to a brief but higher level of mercury vapour during the drilling process.
The MHRA guidance on dental amalgam advises that routine removal of amalgam fillings in otherwise healthy teeth is not recommended. However, if a filling is old, cracked, or deteriorating, replacement with a mercury-free alternative is a sensible and clinically justified decision. In those cases, a dentist experienced in safe amalgam removal techniques, sometimes referred to as the SMART protocol (Safe Mercury Amalgam Removal Technique), can minimise exposure during the process.
What Fillings Don’t Have Mercury: Making the Right Choice for Your Dental Health
Understanding which fillings don’t have mercury is an important step for anyone who wants to make more informed decisions about their dental care. The range of mercury-free materials now available, from composite resin and ceramic to glass ionomer and gold, means that patients have genuine, clinically proven alternatives to traditional amalgam, regardless of budget or clinical need.
The ongoing phase-down of amalgam use in the UK reflects a broader shift towards prioritising patient safety and environmental responsibility in dentistry. While existing amalgam fillings in good condition don’t need to be removed, new restorations placed today are increasingly likely to be mercury-free as a matter of course, particularly for vulnerable groups.
Ultimately, the best filling material for you depends on a conversation with your dentist, who can assess the size and location of the cavity, your medical history, and your personal preferences. As materials science continues to advance, mercury-free alternatives are only improving in durability and accessibility, making the question of what fillings don’t have mercury increasingly straightforward to answer.
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What Fillings Don’t Have Mercury: Frequently Asked Questions
What are the main types of mercury-free dental fillings?
The main mercury-free filling types are composite resin, ceramic (porcelain), glass ionomer, and gold. Each has different strengths, lifespans, and cost implications, so the right choice depends on the location of the tooth and your personal circumstances.
Are NHS fillings mercury-free now?
Many NHS fillings are now mercury-free, particularly following the 2023 phase-down regulations that restrict amalgam use for children, pregnant women, and those with kidney conditions. Composite resin fillings are routinely available under NHS Band 2 treatment for most patients.
Is dental amalgam the same as mercury?
Dental amalgam is not pure mercury but is an alloy that contains approximately 50% elemental mercury combined with silver, tin, and copper. For a fuller overview of what mercury is and how it is used, the Wikipedia page on mercury provides a thorough scientific background.
How long do composite resin fillings last?
Composite resin fillings typically last between five and ten years, depending on the size of the filling, its location in the mouth, and how well you maintain your oral hygiene. With good care, some composite fillings can last considerably longer.
Can children have amalgam fillings on the NHS?
No, the use of amalgam fillings in children under 15 has been restricted in the UK as part of the amalgam phase-down regulations. Mercury-free alternatives such as composite resin or glass ionomer are used instead for paediatric dental restorations.
Do white fillings cost more than amalgam on the NHS?
Both composite (white) and amalgam fillings are available under NHS Band 2 treatment at the same cost to the patient. However, in some clinical situations where a more complex restoration is required, your dentist may recommend an option only available privately.
What is the safest dental filling material available?
Composite resin is widely considered the safest choice in terms of mercury exposure, as it contains no metals or toxic compounds and bonds well to natural tooth structure. Ceramic fillings are also an excellent option for durability and biocompatibility.
Can amalgam fillings affect your health?
For most people, amalgam fillings in stable condition release only trace amounts of mercury vapour, which the NHS and MHRA consider to be at levels too low to cause harm. People with amalgam sensitivity or specific health conditions should discuss their options with their dentist.
Is it safe to have amalgam fillings removed?
Removing stable amalgam fillings is not routinely recommended because the removal process itself releases more mercury vapour than leaving the filling in place. If removal is necessary for clinical reasons, it should be carried out by a dentist trained in safe removal protocols.
What is the SMART protocol for amalgam removal?
SMART stands for Safe Mercury Amalgam Removal Technique and is a set of practices designed to minimise mercury exposure during the removal of amalgam fillings. It involves using high-volume suction, rubber dams, and sectioning the filling rather than grinding it down.
Do composite fillings stain over time?
Composite resin fillings can absorb stains from food, drink, and tobacco over time, which may cause them to discolour compared to your natural teeth. Regular polishing at dental check-ups can help maintain their appearance.
Can I have a mercury-free filling for a back tooth?
Yes, composite resin and ceramic fillings are now strong enough to be used successfully on back teeth (molars and premolars), though your dentist will assess whether they are appropriate based on the size and position of the cavity. Gold is another mercury-free option particularly suited to back teeth due to its exceptional durability.
Are glass ionomer fillings suitable for adults?
Glass ionomer fillings are suitable for adults but are generally used for smaller cavities or in areas of the mouth not subject to heavy chewing forces, as they are less durable than composite resin or ceramic. Their fluoride-releasing properties make them particularly useful for patients at higher risk of decay.
Where can I find NHS guidance on dental fillings and amalgam?
The NHS provides information on dental treatment options and amalgam through its official resources, and the UK Government’s MHRA guidance on dental amalgam outlines the latest restrictions and advice for patients and practitioners.