By Rocco Clayfield, Founder & Director, GoldPaid Ltd · Published 6 August 2026
What the law actually says
The rule people half-remember is section 32 of the Human Tissue Act 2004 (the text is on legislation.gov.uk), which makes it an offence to give or receive a reward for supplying “controlled material”. Read the definition and the worry falls away: controlled material is human material intended to be used for transplantation. A crown that came out at a check-up is not going into anybody, so section 32 does not reach it. There is no separate offence of selling dental scrap, and no licence or registration you need in order to sell your own.
Two details explain where the confusion comes from. The same section expressly excludes material that is “the subject of property because of an application of human skill”, the long-standing common-law position that worked human material can be owned, and a cast crown is about as worked as an object gets. Separately, the Act’s consent and licensing machinery bites on storing or using relevant material for scheduled purposes such as research, education or public display. Teeth sit on the Human Tissue Authority’s relevant-material list; hair and nail from a living person do not. That is why a dental school keeping a tooth collection needs an HTA licence and a patient walking out with their own tooth does not.
The 2004 Act covers England, Wales and Northern Ireland; Scotland has the Human Tissue (Scotland) Act 2006, built on the same transplantation distinction. None of this is legal advice. If your situation is unusual, a disputed estate or material removed at a post-mortem for instance, take proper advice before selling.
Whose property is a removed crown or bridge?
In ordinary circumstances, yours. You paid for the restoration as part of your treatment and it was made to fit you alone. The old common-law line that there is “no property in a body” was never a comfortable fit for a manufactured article, and in Yearworth v North Bristol NHS Trust [2009] EWCA Civ 37 the Court of Appeal accepted that a person can hold property rights in material that came from their own body.
The practical rule matters more than the doctrine. Say what you want before the appointment and ask the practice to put the crown in a pot for you to take home. Once you have left without it, the piece will normally have gone into the practice’s waste or scrap stream, and those routes are not reversible. A practice saying a crown cannot be retrieved afterwards is usually stating a fact rather than being obstructive.
What dental practices and laboratories must do
A practice cannot treat everything it removes as free scrap, because most of it is regulated waste. The framework is the duty of care under the Environmental Protection Act 1990, the Hazardous Waste Regulations 2005 in England and Wales (Special Waste Regulations in Scotland), and the NHS guidance in HTM 07-01 on the safe management of healthcare waste.
- Extracted teeth with no amalgam in them go into the offensive or clinical waste stream under HTM 07-01, wrapped securely so they cannot puncture the bag.
- Teeth or restorations carrying amalgam must be segregated into a sealed, puncture-resistant container with a mercury suppressant and sent for mercury recovery. The Care Quality Commission is explicit that these do not go into ordinary clinical waste.
- Amalgam separators retaining at least 95 per cent of particles have been required since January 2018, under Regulation (EU) 2017/852 as retained in UK law and the Control of Mercury (Enforcement) Regulations 2017.
- Since 1 July 2018 amalgam must not be used on deciduous teeth, on patients under 15, or on pregnant or breastfeeding patients, unless the dentist judges it strictly necessary and records why.
- Consignment notes for hazardous waste are kept for three years; ordinary waste transfer notes for two.
The amalgam picture now differs across the UK. EU Regulation 2024/1849 banned the use of dental amalgam across the EU from 1 January 2025. Northern Ireland, where the EU mercury rules apply under the Windsor Framework, secured a derogation allowing continued use until 31 December 2034. Great Britain has kept the phase-down rather than a ban. None of that affects gold: amalgam is a mercury and silver material with no gold in it and no melt value.
Bench scrap is a separate matter. Sprues, buttons, failed castings, bridgework a patient has left behind and bench sweepings belong to the practice or laboratory and can be sold. Anything a patient has asked to keep does not. GoldPaid buys sorted practice and laboratory lots by post, and does not buy amalgam in any form.
How to tell whether a restoration actually contains gold
Laboratories describe alloys using the American Dental Association classification: high noble means more than 60 per cent noble metal of which more than 40 per cent is gold; noble means at least 25 per cent noble metal; predominantly base means under 25 per cent. “Noble ” covers gold, palladium, platinum, rhodium, ruthenium, iridium and osmium, so a noble alloy is not necessarily a gold-rich one. That point explains most of the surprises people get.
- Deep yellow, cast to shape, thin and shell-like with a polished inner surface. Usually a high-noble crown, inlay or onlay, and the likeliest thing in the drawer to carry real gold.
- Tooth-coloured with a thin metal collar, or a metal shell showing underneath. Porcelain-fused-to-metal. The coping under the ceramic may be high-noble, or nickel-chrome or cobalt-chrome with no gold at all.
- Silver-coloured. Not proof of nothing. White high-noble alloys exist, some close to half gold by weight alongside palladium, though most silver-coloured crowns are cobalt-chrome or stainless steel.
- Grey, dull and packed into a cavity rather than cast to shape. That is amalgam: mercury and silver, no gold, hazardous waste, not something to put in the post.
- Gold-coloured but oddly bright, or worn through in patches. Some base-metal crowns carry a gold-coloured coating. Colour alone settles nothing either way.
None of it is hallmarked. Dental alloys are never sent to an assay office, so there is no punch to read and no hallmark to check. With dental work it is assay or nothing, which is why identification and testing are really the same question.
How XRF reads a dental alloy, and where it stops
X-ray fluorescence excites the metal and reads the characteristic energies the elements send back, reporting the alloy as proportions. On dense metals such as gold the layer actually analysed is only around 10 to 20 micrometres deep, so the instrument describes the surface it is pointed at rather than the whole object. On dental work that has three consequences.
- Ceramic is not metal, so a reading taken through a porcelain facing is unreliable. The assay is taken on exposed alloy, usually the bare fitting surface inside the crown.
- A coating can dominate a shallow reading. Where a gold-coloured surface looks suspect, the reading is repeated on a clean, lightly abraded area so the underlying alloy answers.
- Very light elements barely fluoresce. Lithium, beryllium and boron are effectively invisible to XRF, so a composition read on an old base-metal alloy is a strong indication rather than a full recipe.
Composition is only half of value. XRF gives proportion and an offer needs mass, so every piece is weighed on calibrated scales, and porcelain, cement, tooth material and any base-metal substructure carry weight holding no gold. A bridge is assayed piece by piece rather than from one sample, because retainers, pontics and solder joints need not be the same alloy. Typical alloy ranges by restoration type are set out on the dental gold page.
Hygiene and handling before you post anything
- A rinse in warm soapy water and a dry on kitchen roll is plenty. Cleaning is not a condition of sending.
- Do not pick, scrape or grind at attached porcelain. Working at it by hand loses gold rather than revealing it.
- Seal the pieces in a small bag, or a pill pot inside a bag, so nothing works loose in a padded envelope.
- If a whole natural tooth is still attached, message before posting and we will confirm how to handle it.
- Amalgam goes to a licensed dental amalgam waste contractor, never into the post.
If the pieces turned up while clearing a relative’s house, the sale is the same process; our guide to selling inherited gold jewellery covers the paperwork where an estate is involved.
Common questions
Is it legal to sell a gold crown that came out of my own mouth?
Nothing in UK law prohibits it. The Human Tissue Act 2004 restricts paid dealings only in material intended for transplantation, and a cast crown is a manufactured article rather than human tissue. No licence or registration is needed to sell your own. This is general information rather than legal advice.
Can my dentist refuse to give me my crown back?
Ask before the appointment and it is rarely an issue. Once a restoration has gone into a sealed amalgam or clinical-waste container it cannot be retrieved, because those streams are regulated under HTM 07-01 and the hazardous waste rules. That is a waste-routing limit rather than a claim of ownership.
Is it legal to sell dental gold that belonged to a relative who has died?
Yes, on the same footing as any other item in an estate, and it should be included in the estate accounts at an honest figure rather than written off. Where probate is involved the executor deals with the sale. Take professional advice if the estate is contested.
Do dental practices need permission to sell their scrap gold?
Scrap the practice or laboratory owns, such as sprues, buttons, failed castings and bridgework left behind, can be sold. Anything a patient has asked to keep remains the patient’s property. Waste containing amalgam is regulated separately and goes to a licensed contractor for mercury recovery.
Is dental gold hallmarked?
No. Dental alloys are cast by laboratories and never submitted to a UK assay office, so there is no punch to read. Content is established by XRF assay, the piece is weighed, and the written offer shows both.
Do you buy amalgam fillings?
No. Amalgam contains mercury, is classed as hazardous waste, and belongs with a licensed dental amalgam waste contractor. It holds no gold and no melt value.