Auricular Acupuncture for Dental Anxiety: A Randomized Controlled Trial

Anxiety related to dental treatment is a common experience that affects millions of people around the world. It is estimated that approximately one-third of adults have fear of dental procedures, while about 10% develop a true dental phobia. This condition not only causes suffering to patients, but can also lead to canceled appointments, delayed treatment, and consequent deterioration of oral health. For many people, the fear is so intense that they end up requiring hospital sedation for routine dental procedures, such as dental extractions.

Traditionally, anxiolytic medications such as midazolam have been used to control this anxiety, but there is always concern about side effects such as respiratory depression and prolonged sedation. In this context, complementary therapies such as auricular acupuncture emerge as promising alternatives, offering potential anxiety relief without the risks associated with sedative medications.

This randomized controlled trial was conducted at the Hannover Medical School in Germany, with the goal of directly comparing the efficacy of auricular acupuncture with intranasal midazolam in the treatment of dental anxiety. The researchers recruited 67 patients who needed dental extractions and randomly assigned them to four different groups. The first group received true auricular acupuncture, with needles inserted at specific points on the ear known to produce relaxation. The second group received placebo auricular acupuncture, where blunt needles were applied at points that have no proven effect on anxiety.

The third group received intranasal midazolam, an anxiolytic medication well established in clinical practice. The fourth group served as a control, receiving no specific anxiety treatment. To measure anxiety levels, the researchers used scientifically validated questionnaires, including the Spielberger State-Trait Anxiety Inventory and visual analog scales. They also continuously monitored patients' vital signs, such as heart rate and oxygen saturation, and assessed the level of sedation and the quality of dental treatment conditions.

The results demonstrated that both auricular acupuncture and intranasal midazolam were significantly more effective in reducing dental anxiety compared with the group that received no treatment. Interestingly, there was no statistically significant difference in efficacy between auricular acupuncture and midazolam, suggesting that both approaches offer similar benefits in anxiety control. The beneficial effects were observed as early as 30 minutes after the start of the interventions, demonstrating a relatively rapid onset of action for both treatments. In addition, dentists reported better working conditions and greater patient cooperation in the groups that received auricular acupuncture or midazolam, compared with the control group.

A particularly interesting aspect was that, although the group that received placebo acupuncture also showed some improvement in anxiety, it was smaller than in the groups with active treatments, suggesting that the benefits observed are not due exclusively to placebo effect. The researchers observed that some patients in the midazolam group reported temporary nasal burning, while no adverse effects were reported in the acupuncture groups.

The clinical implications of this study are important for both patients and dental professionals. For patients, the results offer evidence that auricular acupuncture may be an effective and safe alternative to traditional anxiolytic medications. This is especially relevant for people who prefer to avoid medications, have contraindications to the use of benzodiazepines, or are concerned about side effects such as prolonged sedation. Auricular acupuncture offers the additional advantage of not causing respiratory depression or prolonged cognitive impairment, allowing patients to resume their normal activities more quickly after dental treatment.

For dentists and other oral health professionals, auricular acupuncture represents an additional tool in the management of dental anxiety, complementing existing pharmacological and behavioral strategies. The procedure is relatively simple to learn and apply, requires minimal equipment, and can be easily integrated into routine clinical practice. In addition, by improving patient cooperation and working conditions, it can contribute to more efficient and successful dental treatments.

It is important to recognize some limitations of this study that should be considered when interpreting the results. The number of participants was relatively small, especially in the control group, which may limit the generalizability of the findings to larger populations. In addition, it was not possible to maintain complete blinding in all groups, since patients could perceive whether they were receiving intranasal medication, acupuncture, or no specific treatment. This methodological limitation is common in studies comparing such different interventions.

The study also did not systematically assess pain during the procedure, which could influence the reported anxiety levels. Another aspect to consider is that all participants were patients who required dental extractions, and the results may not apply directly to other types of dental procedures or to patients with different baseline levels of dental anxiety.

Despite these limitations, this study represents a valuable contribution to the scientific literature on the management of dental anxiety, being the first to directly compare auricular acupuncture with an established anxiolytic medication. The results suggest that auricular acupuncture deserves serious consideration as a complementary therapeutic option in the treatment of dental anxiety. For patients who suffer from fear of dental procedures, this research offers hope that there are effective and safe alternatives to traditional medications. The researchers conclude that future studies with larger populations are needed to confirm these findings, but encourage dentists to consider auricular acupuncture as an adjunct to conventional anxiety management strategies.

This integrative approach, combining the best of conventional and complementary medicine, can offer patients a more comfortable and less stressful dental experience, contributing to better oral health outcomes in the long term.