What does biologic dentistry mean, and which questions should a patient ask?

A philosophy, not a specialty

"Biologic dentistry" has no official definition. There is no licensing category, no accredited residency and no recognized specialty or certifying board behind the term. Under the ADA Code of Ethics, which binds the association's members, a dentist may announce as a specialist only in a field recognized by the ADA's National Commission on Recognition of Dental Specialties and Certifying Boards, such as endodontics, periodontics or orthodontics, and general dentists who describe their services are expected to avoid implying a specialty they do not hold. State dental boards set the advertising rules that apply to every licensed dentist. "Biologic," "biological" and "holistic" are not on that list. A dentist who uses them is usually a general dentist describing an emphasis: a preference for certain materials, a conservative approach to drilling, and a habit of asking about the rest of your health.

That is not a criticism. Much of what the label describes, such as preserving tooth structure, avoiding materials a patient reacts to and preventing disease rather than repairing it, is careful dentistry. The point is that the label promises nothing by itself. Two practices using the same word can make very different choices, and the only way to know what you are getting is to ask what is done and why.

The standard worth applying is the one the ADA calls evidence-based dentistry: decisions that combine the best available scientific evidence with the dentist's clinical judgment and your own needs and preferences. A "biologic" choice that meets that standard is a reasonable choice. One that is justified only by the label is not.

The terminology, decoded

Biologic, biological, holistic, integrative

These words are used almost interchangeably. "Holistic" tends to stress the whole person, "integrative" suggests coordination with physicians and other providers, and "biologic" or "biological" usually points to materials and tissue preservation. None is a credential, and none tells you what a particular office actually does.

Biocompatible

In regulation, a biocompatible material is one that has been tested for how body tissues respond to it. Dental implant systems made of titanium and of zirconia, for example, are both FDA-regulated medical devices, typically made from materials that follow international consensus standards for safety. In advertising, the word is sometimes stretched to imply that one material is "natural" and another "toxic." If you hear the word, ask which meaning is intended and what testing is being referred to.

Mercury-free and mercury-safe

"Mercury-free" means the practice does not place amalgam (silver-colored) fillings, which contain elemental mercury bound to other metals. "Mercury-safe" usually means that when an existing amalgam filling does need to come out, the office takes precautions to limit the mercury vapor and particles released by drilling. The two terms describe different things: one is about what goes into a tooth, the other about how something comes out. Neither means your existing fillings should be removed; more on that below.

Metal-free

This usually refers to ceramic (zirconia) implants and all-ceramic crowns rather than titanium implants or metal-based crowns. Titanium is the longer-studied implant material; zirconia is a newer alternative with good short-term results and a shorter track record.

What biologic dentistry means at this practice

Loul Dental Studio describes itself as a biologic practice. The choices below reflect the services its website lists, plus two questions this guide suggests you ask about amalgam removal and fluoride, each with a plain statement of how well the evidence supports it. The linked service pages describe the philosophy; this guide describes the evidence.

• No amalgam fillings are placed. Evidence status: a reasonable, supported option. The FDA advises that certain groups, including pregnant and nursing women, young children and people with neurological disease, kidney impairment or a known sensitivity to mercury, use non-mercury filling materials when possible and appropriate. For other patients the FDA continues to allow amalgam, having found that the majority of evidence does not show harm to the general population, so choosing tooth-colored restorations instead is a legitimate preference rather than a safety necessity. See the mercury-free dentistry page.
• Existing amalgam fillings: ask before anything is removed. Evidence status: the FDA position. Taking out an intact amalgam filling removes healthy tooth structure and temporarily increases your exposure to mercury vapor, so the FDA does not recommend removing sound fillings unless it is medically necessary. A worn, cracked or leaking filling is replaced for the same reasons any filling would be. The ADA Code of Ethics goes further: recommending removal of amalgam fillings from a non-allergic patient "for the alleged purpose of removing toxic substances from the body," when done solely at the dentist's recommendation or suggestion, is named as improper and unethical. Ask the office whether it recommends removing intact amalgam fillings, for what clinical reason, and what precautions it uses during any removal.
• Conservative, adhesive restoration. Evidence status: mainstream dentistry. The practice calls its restorative approach biomimetic: bonded inlays, onlays, overlays and crowns, milled in-house, with the aim of keeping as much sound tooth as possible. Preserving tooth structure is a goal all of dentistry shares; the right restoration for a given tooth still depends on how much is left, where the damage is and how you bite. A conservative approach does not promise that a crown or root canal treatment can be avoided. See the biomimetic dentistry page.
• Ceramic (zirconia) implants offered as an alternative to titanium. Evidence status: emerging. Titanium and zirconia implant systems are both FDA-regulated devices made from materials that follow international consensus standards, and either can fail. A genuine titanium allergy does occur but appears to be rare, so "metal-free" is a preference for most people and a medical reason for very few. Zirconia implants show high survival in the studies published so far, but follow-up in those studies is short and long-term data remain limited compared with titanium. For a fuller comparison see ceramic versus titanium implants.
• Fluoride: ask how the office approaches it. Evidence status: fluoride is strongly supported. The ADA's position is that fluoride in toothpaste, in professionally applied varnish or gel and in community water prevents tooth decay, mainly by helping enamel take minerals back up and resist acid. Some biologic practices limit routine fluoride use; others talk through your fluoride exposure and decay risk before recommending it. Ask the office how it approaches fluoride for you, and what it recommends instead wherever it limits fluoride, so that your decay risk is managed either way.
• Ozone therapy and laser dentistry. Evidence status: depends on the use; ask what each is meant to do. Both appear on the practice's service list; a laser is an instrument that may be used within a procedure, while ozone is an addition to standard treatment rather than a treatment on its own. Federal labeling rules for devices that generate ozone describe ozone as a toxic gas with "no known useful medical application" and cap the ozone such a device may release into an occupied room, which is why delivery method and exposure control matter. If either is proposed for you, ask what it is meant to do in your case, what evidence supports it for that use and what the standard treatment would be. An adjunct is something added to indicated care, not a substitute for a cleaning, a filling, root canal treatment or other indicated treatment. See the ozone therapy and laser dentistry pages.

What biologic dentistry does not claim

Association is not causation

Gum disease is associated with diabetes and heart disease, and researchers are studying links with other conditions. Some of that association reflects shared risk factors, and whether treating gum disease improves those conditions is still being studied. Treating your gums is worthwhile for your mouth and may matter for your overall health; it is not a treatment for heart disease or diabetes, and no dental procedure should be presented as a cure for, or prevention of, a systemic disease. This guide does not make that claim.

Dental treatment is not a hidden cause of systemic illness

A persistent claim in some holistic circles is that root canal-treated teeth cause disease elsewhere in the body. The idea traces to research from the early 1900s that was poorly designed and has long since been discredited; there is no valid scientific evidence linking root canal treatment to disease elsewhere in the body. A biologic approach may favor preventing the need for root canal treatment through early, conservative care; it does not mean that an indicated root canal is dangerous, or that an infected tooth is better removed on principle.

Removing materials is not "detox"

There is no reliable evidence that removing amalgam fillings treats chronic fatigue, autoimmune disease or other systemic conditions, and the ADA's ethics code specifically names the removal of amalgam fillings from a non-allergic patient "for the alleged purpose of removing toxic substances from the body," when done solely at the dentist's recommendation or suggestion, as improper and unethical. The same test applies to any material, conventional or alternative: what is the evidence that it works in your situation, and what are the alternatives?

Questions to ask any dentist who uses the label

1. Are you a general dentist or a specialist in a recognized field, and what does "biologic" add to that training?
2. Which materials do you avoid, and what is the evidence behind each choice?
3. Do you recommend removing my existing amalgam fillings? If so, for what clinical reason, and what do you expect to change?
4. How do you approach fluoride, and how will my decay risk be monitored?
5. If I need root canal treatment, do you provide it or refer me, and how do you decide?
6. Which of the treatments you offer are adjuncts, and what is the standard treatment they are added to?
7. What do you not claim a dental treatment can do for my general health?
8. Can I have the plan in writing and itemized? Our guide to comparing treatment quotes shows what a complete plan lists.

The next step

If the philosophy appeals to you, judge the practice by its answers rather than its label. Bring a list of your medications, any known allergies or sensitivities to metals or other materials, and recent X-rays to a first visit; our guide to your first visit lists what else to bring and ask. You can request an appointment online, which the team follows up to confirm, or call (805) 565-5111 during office hours, Monday to Thursday from 8:00 am to 5:00 pm. The practice's own biologic dentistry page sets out its philosophy; this guide is the evidence-based companion.