Dental Hypnosis: When Dentistry Need Not Be Filled with Fear

Perhaps you are someone who has let a tooth decay until the whole thing had to come out, simply because the sound of the drill frightened you more than the pain that was coming. Or someone who sits in the chair with clenched hands, breaking into a sweat, heart racing, before the dentist has so much as touched you.

If that is you, you are not alone. Fear of the dentist is among the most common fears in children and adults alike, and for some people it is severe enough to be classified as a formal phobia rather than an ordinary dislike.

Why the dental chair frightens some people so much

One study used fMRI to scan the brains of people with severe dental fear while exposing them to dentistry-related cues. The amygdala — the brain's fear-processing center — showed clearly heightened activity, alongside other regions involved in emotion and pain such as the hippocampus and the insula. Meanwhile the comparison group without dental fear showed almost no amygdala response at all.

Which means the fear is not merely an exaggerated thought. It is the brain genuinely responding at the same level as it would to real danger. The sound of the drill, the smell of anesthetic and disinfectant, the feel of the chair, even simply sitting in the treatment room — these become cues that set the brain's alarm circuit running at full capacity, when in reality none of it is life-threatening.

What dental hypnosis is

Using hypnosis in dentistry is not new. There are records of hypnosis being used to reduce pain and fear during tooth extraction as far back as 1829 — before modern anesthetics had been developed.

Dental hypnosis is the use of hypnotic technique alongside dental treatment, helping a patient enter a state of deep relaxation before and during a procedure. The conscious mind, watching intently for danger, gradually settles, and the fear circuit that had been running automatically begins to be reshaped as well.

The same fMRI study is particularly interesting here. After patients with severe dental fear were brought into a hypnotic state for only a short period, activity in the amygdala and in the fear-related regions was found to have decreased significantly. The research team concluded that this is scientific evidence that hypnosis can genuinely inhibit the activity of the brain's fear circuit — not merely produce a sensation of feeling more relaxed.

What is it used for?

Beyond easing general anxiety, dental hypnosis has been used to help control the gag reflex in patients who are excessively sensitive to stimulation in the mouth — a significant obstacle for certain kinds of treatment, such as implant work or taking impressions. It has also been used to help manage pain during procedures where there is reason to reduce the use of local anesthetic or sedation.

Fear of the dentist is not something to be endured for a lifetime. Nor is it something to be embarrassed about, because it is the brain genuinely at work — not a weakness.

To understand how phobias and fears that resist reason form in the brain, we have written “Phobia, and Why Telling Yourself Not to Be Afraid Never Works”. And for how the principle that attention amplifies pain relates to physical pain, “The More You Attend to It, the More It Hurts” follows that thread.