A biological dentist and a conventional dentist hold the same licence. In the UK both are registered with the General Dental Council, both took the same degree, and neither can practise without the other’s qualification. There is no separate register, and no recognised specialty.
What differs is everything downstream: which materials go in the mouth, which imaging is used, what happens to a failing root canal, and how far the consultation reaches beyond the teeth. Most of those differences are uncontroversial. Three carry formal professional objections — from the American Dental Association, the American Association of Endodontists and the British Endodontic Society.
For the underlying definitions see what biological dentistry is. This is the in-depth comparison.
What actually differs at the appointment?
These are practice patterns rather than rules. A conventional dentist may use cone beam imaging; a biological dentist may retreat a root canal. But across the field, this is where the two diverge.
| Conventional dentistry | Biological dentistry | |
|---|---|---|
| Qualification | GDC registration | The same GDC registration, plus post-qualification courses. Not a recognised specialty |
| Fillings | Amalgam or composite, by clinical judgement | Composite, ceramic or glass ionomer only |
| Crowns | Metal-ceramic, gold or all-ceramic | All-ceramic only — lithium disilicate or zirconia |
| Implants | Titanium | Zirconia ceramic |
| Amalgam removal | Rubber dam and suction as clinically indicated | The same measures bundled as a named protocol and applied routinely |
| Imaging | Panoramic and periapical X-rays; cone beam where justified | Cone beam CT used more readily |
| Failed root canal | Retreatment, or apical surgery | Extraction more often preferred to retreatment |
| Extraction sites | Socket left to heal | Curettage, sometimes platelet-rich fibrin, sometimes surgery for suspected cavitations |
| Consultation | Teeth, gums, bite, medical history | The same, plus diet, sleep and prior dental work |
| Availability | NHS or private | Almost entirely private |
Three differences carry most significance: the metal comes out, the imaging goes up, and the threshold for surgery comes down. Removing the metal is now regulatory policy across the EU. Lowering the surgical threshold tends to be where professional objections stem from.
Is a biological dentist qualified differently?
No. In the UK there is no biological dentistry qualification, no separate register and no recognised specialty.
A biological dentist is a dentist on the GDC register who has taken additional courses after qualifying, in the same way another dentist might take courses in implantology or orthodontics. Those courses are not standardised, not accredited by any UK body, and range from weekend seminars to structured programmes.
Dr Dominik Nischwitz, who runs one of the larger training programmes, is explicit that what he teaches is a knowledge gap rather than a technical one — and that the gap runs the other way too:
“What we are doing is a complete new profession. It has literally nothing to do with conventional dentistry, besides the fact that we are doing conventional dentistry too, on the highest level, which is just the repair business.”
His own course is a ten-hour online programme, after which a dentist may attend in person. That is a reasonable amount of continuing education but it is no, on it’s own, a specialty.
He also frames the difference in the training itself as philosophical rather than procedural:
“Conventional medicine focuses on the absence of disease. And the same for dentistry: absence of tooth decay, or absence of pain. But for me, health is not the zero, it’s a ten, it’s a hundred.”
The practical consequence is a different threshold for intervening. A dentist treating disease and a dentist optimising health will reach competing conclusions about a tooth that is causing no symptoms.
Are biological dentists as technically skilled?
Not always. Nischwitz, who trains several hundred dentists a year in the field, says he regularly treats patients left with unfinished work by biological and holistic practitioners:
“One of the biggest issues we’re facing is that I see a lot of patients that had seen biological dentists or holistic dentists with unfinished work, with subpar technical work, unfortunately. And this is why I literally understand high-tech conventional dentists that instantly are put off from the word of biological, holistic — because oftentimes, unfortunately, it seems to be a cover-up.”
His example is the one a patient would care about most. Removing a root-treated tooth without a plan for what replaces it, he says, “is insanity” — the tooth was holding the bite and the bone, and alveolar bone recedes once it is gone.
Note who is making the complaint. Nischwitz has spent fifteen years defending this field publicly, at some cost, and he is conceding a technical deficit among its practitioners and saying conventional dentists are right to have noticed it.
The label tells a patient which materials a dentist uses. It says nothing about their standard of work, something Nischwitz is on a mission to elevate.
Where do the two disciplines agree?
On four things, three of which became mainstream policy or consensus after 2023.
Gum disease and systemic health. The periodontitis–diabetes link is accepted as bidirectional by consensus of the European Federation of Periodontology and the International Diabetes Federation, and periodontal treatment measurably reduces HbA1c in patients with both conditions. That is the strongest oral–systemic finding in dentistry, and it is not a biological dentistry claim.
Treating infection. The dispute over root canals concerns what to do with a tooth that has already been treated successfully. Neither discipline argues that untreated infection should be left.
The amalgam phase-out. The EU banned amalgam from January 2025 and Minamata COP-6 agreed a global phase-out by 2034, on environmental rather than clinical grounds. The British Dental Association is arguing about pace, not principle.
Ceramic implants. The International Team for Implantology’s 2023 consensus puts zirconia five-year survival at 97.2%, comparable to titanium, and accepts it for single crowns and three-unit bridges.
What remains in dispute is three procedures.
Where do they genuinely disagree?
On three procedures, each relating to a specific professional objection.
Removing sound amalgam fillings. The ADA’s Code of Ethics calls removal from a non-allergic patient for detoxification purposes “improper and unethical”. The FDA advises against it. SDCEP finds no reason to replace clinically sound restorations except where there is an allergy, and the Oral Health Foundation warns that removal weakens teeth.
Root-treated teeth as a cause of systemic disease. The American Association of Endodontists finds no valid scientific evidence for it. The British Endodontic Society calls the claim “unfounded and malicious” and root canal treatment “one of the best documented and safest procedures”.
Cavitation surgery. The AAE “cannot condone surgical interventions intended to treat suspected NICO lesions”, and no UK dental body has published a position at all. What has changed is the research: a January 2026 paper from Goethe University Frankfurt confirms that extraction sockets frequently fail to fill in completely, while explicitly leaving open whether that is a disease.
Each of these is graded against the evidence, claim by claim, in the benefits of biological dentistry.
Is one safer than the other?
Conventional dentistry’s risk is in what it puts in: materials chosen for durability rather than biological neutrality. Amalgam is the obvious example, and titanium particle release is now a live topic in mainstream periodontology rather than a fringe concern.
Biological dentistry’s risk is in what it takes out. Drilling out an intact filling spikes mercury exposure and destroys sound tooth structure. Extracting a root-treated tooth removes something that was stabilising the bite and the bone. Operating on a suspected cavitation means surgery on a lesion with no gold-standard diagnostic method. Each is a procedure a conventional dentist would not have performed.
The largest dataset in restorative dentistry points somewhere else. Across 222,836 restorations placed by 67 dentists, annual failure rates ran from 2.6% to 7.0% depending on who did the work — a wider spread than any material comparison in the literature.
What does it cost to switch?
Substantially more, because almost nothing biological dentistry offers beyond conventional restoration is available on the NHS.
An NHS course of treatment in England is banded at £27.90, £76.60 or £332.10. Privately, a zirconia implant runs from about £2,000 for the fixture before the crown, and protected amalgam removal from £199 to £475 per tooth including the replacement filling. Comparing titanium against zirconia at the same practice, the ceramic premium holds at roughly £500 to £650.
The full treatment-by-treatment costings are in how biological dentistry treatments compare.
Which should you choose?
For most routine work, no choice is being made. A filling, a crown, a scale and polish, treatment for gum disease: both disciplines perform the same procedure, and the only variable is which material goes in.
The choice becomes real at four points. If you need a new filling or crown and would rather not have amalgam — a preference most of the world’s regulators now share. If you have a diagnosed amalgam allergy. If you need an implant and have reason to avoid titanium. And if you are being offered surgery for a condition your conventional dentist does not recognise, where the question to ask is not which philosophy is right but what evidence exists for that specific procedure.
On the last of those, Nischwitz sets a narrower bar than the field’s marketing does. Asked what he tells a patient who has root canals and feels well: “Just leave it, no problem.”
Biological versus conventional dentistry: key facts
Qualification: identical. Same GDC registration, same degree. No separate register, no recognised specialty, no accredited UK training standard.
The main practical differences: metal-free materials only, cone beam imaging used more readily, bundled protective protocols during amalgam removal, extraction preferred to retreatment for failing root canals, and surgery for suspected cavitations.
Where they agree: gum disease matters systemically, infection should be treated, amalgam is being phased out, ceramic implants work.
Where they disagree: removing sound fillings, root-treated teeth as a systemic cause, and cavitation surgery. All three carry explicit professional objections.
Availability: conventional dentistry is available on the NHS; biological dentistry is almost entirely private.
The variable that outweighs both: operator. Annual restoration failure rates across 222,836 restorations ranged from 2.6% to 7.0% depending on the dentist.
About this article
Written by Jon Lipsey. Sources are named in the text. Quotations from Dr Dominik Nischwitz are taken from interviews conducted for Unfiltered; the full interview is published separately.
