What Is Biological Dentistry? Materials, Amalgam Fillings and Questions to Ask

“Biological dentist” and “holistic dentist” are among the most searched dental terms in Toronto, but they are not always explained clearly. Some offices use them to describe careful, conservative dentistry. Others use them to promise health benefits the evidence does not support. This guide explains what biological dentistry usually means, where it overlaps with good everyday dentistry, how it approaches amalgam fillings, and what to ask before you choose a dentist.

What does “biological dentistry” mean?

Biological dentistry is a philosophy, not a specialty. It treats the mouth as part of the whole body and asks how each material and procedure might affect a patient’s overall health. Dentists who use the term commonly emphasize:

• A detailed medical history, including medications, allergies and chronic conditions
• Prevention and early treatment that keeps as much natural tooth as possible
• Metal-free restorations, such as composite resin and ceramic, where they suit the tooth
• Careful protocols when old amalgam fillings are replaced
• Gum health, because gum inflammation is linked with conditions such as diabetes and heart disease
• Coordination with physicians and other health providers when needed

In Canada, the recognized dental specialties are set by regulators and do not include biological or holistic dentistry. A dentist who uses these words is a general dentist, or a specialist, who practises with this approach.

Biological, holistic, biocompatible: are they the same?

The terms overlap:

• Holistic dentistry usually describes the wider approach: considering lifestyle, stress, sleep, nutrition and overall health along with the teeth.
• Biological dentistry focuses more on materials and how the body responds to them.
• Biocompatible is a technical term for a material that does its job without causing a harmful reaction. All approved dental materials are tested for biocompatibility, but a person can still be sensitive to a specific ingredient.

You can read how our office thinks about this in what holistic dentistry means at Regal Heights.

What about amalgam (silver) fillings?

Amalgam is a mix of metals, including about half mercury bound with silver, tin and copper. It has been used for more than a century because it is durable and inexpensive. Concern centres on small amounts of mercury vapour released from the filling, especially during chewing, grinding, placement or removal.

What regulators say:

• The Royal College of Dental Surgeons of Ontario states that removing serviceable amalgam fillings in patients with no sign of a mercury-related health problem, such as a confirmed allergy, is not justified.
• The U.S. Food and Drug Administration advises against removing intact fillings without a medical reason, because removal loses healthy tooth structure and briefly increases mercury vapour exposure. It also suggests that some higher-risk groups, such as pregnant people, young children and people with kidney disease or a known mercury sensitivity, discuss alternatives to new amalgam fillings with their dentist.
• Health Canada has long advised against removing sound amalgam fillings in healthy people, while recommending that amalgam not be used in some groups where alternatives are suitable.

In short, an intact amalgam filling that is not causing problems usually does not need to come out just because it is amalgam. Replacement makes sense when a filling is cracked or leaking, when there is decay underneath, when a tooth needs a different restoration for structural reasons, or when you and your physician have a medical reason.

What is “safe” amalgam removal?

When an amalgam filling does need to be replaced, drilling it out creates heat, vapour and fine particles. Precautions can reduce exposure for both the patient and the dental team. Common steps include:

• A rubber dam to isolate the tooth from the rest of the mouth
• High-volume suction placed close to the tooth
• Plenty of water spray to keep the filling cool
• Cutting the filling out in larger pieces instead of grinding it all away
• Protective covers and an alternative air supply for the patient
• Proper capture and disposal of amalgam waste

Ask any dentist what precautions they use. A clear, specific answer is a good sign.

How are filling and crown materials chosen?

Most dental offices, biological or not, now use metal-free materials for many restorations. Each material has strengths and limits, and the right choice depends on the tooth:

• Composite resin is tooth-coloured and bonds to the tooth, so less healthy structure needs to be removed. It suits small and medium fillings, but it is more technique-sensitive and can wear or stain over time.
• Glass ionomer releases fluoride and bonds well in moist areas, such as near the gumline or in some children’s teeth. It is less wear-resistant than composite.
• Ceramic (porcelain or zirconia) is strong, stable and well tolerated, and is used for crowns, onlays and some larger restorations. It usually needs lab work and costs more.
• Gold alloys are very durable and gentle on opposing teeth, though they are metal and less commonly chosen today.

Good material choice considers the size and location of the restoration, how hard you bite or grind, how dry the area can be kept, your allergies and sensitivities, cost and how long you expect the restoration to last. If you have a known allergy, such as to a metal or a resin ingredient, tell your dentist and bring any test results from your physician or allergist.

Which parts of biological dentistry are well supported?

Much of what biological dentists value is simply good dentistry:

• Prevention first. Catching gum disease and early decay early means less drilling and fewer large restorations.
• Minimally invasive treatment. Small, bonded fillings keep more natural tooth than older techniques.
• Health history matters. Medications, diabetes, pregnancy, reflux and dry mouth all change dental risk and treatment.
• Gum health and the body. Periodontal disease is associated with diabetes and cardiovascular disease, and managing it is part of caring for the whole person.
• Avoiding unnecessary care. Choosing Wisely Canada encourages dentists and patients to question tests and treatments that will not change outcomes.

Where to be cautious

Some claims made under the biological label go beyond the evidence. Be cautious if an office:

• Recommends removing all amalgam fillings, or root canal–treated teeth, to cure unrelated illnesses
• Uses tests that are not recognized for diagnosis to decide what to remove
• Promises that dental treatment will treat conditions such as chronic fatigue, autoimmune disease or cancer
• Discourages you from seeing your physician
• Proposes a large treatment plan without X-rays, a full exam and a clear explanation of each step

A thoughtful dentist will explain the evidence, including its limits, and will respect your choices without pressure.

Questions to ask a biological or holistic dentist

1. What does biological or holistic dentistry mean in your office, in practical terms?
2. How do you choose filling and crown materials for each tooth?
3. If I have amalgam fillings, how will you decide whether any need replacing?
4. What precautions do you use when removing amalgam?
5. How do you coordinate with my physician if I have a medical condition?
6. What are the alternatives to this treatment, including waiting and monitoring?
7. Can I have a written estimate before we start?

Whole-body dental care at Regal Heights

At our St. Clair West office, whole-body care starts with a thorough history and exam, conservative treatment and clear discussion of materials. Learn about our systemic care approach or our restorative dentistry, and contact our team if you would like to talk through your existing fillings or material preferences.