Acupuncture for Temporomandibular Joint Muscular Disorder: A Prospective Clinical Assessment of Its Therapeutic Effectiveness

Temporomandibular disorders (TMD) represent one of the most frequent complaints in dental practice, affecting millions of people worldwide. This condition causes significant pain in the jaw joint and the muscles of mastication, and can radiate to regions such as the ear, head, and neck. In addition to pain, many patients experience symptoms such as vertigo, tinnitus, and difficulty opening the mouth adequately. Epidemiologic data show that TMDs affect about 10% of the population, predominantly women around 30 years of age.

Several factors contribute to the development of this condition, including psychological stress, malocclusion, trauma, orthodontic procedures, and other health conditions. The impact on patients' quality of life is considerable, affecting basic activities such as speaking, eating, and sleeping.

This prospective clinical study aimed to evaluate the efficacy of acupuncture in the treatment of muscular pain associated with temporomandibular disorders. The researchers selected 15 participants between 14 and 50 years of age who presented with pain in the temporomandibular joint region for at least three months, without visible abnormalities on X-ray examinations. The treatment used specific acupuncture points traditionally employed for problems in the face and jaw region: Ting Hui, Ting Gong, and Ermen (located near the ear), Fengchi (at the base of the skull), Baihui (at the top of the head), and He Gu (on the hand, between the thumb and index finger). The procedure involved the insertion of very fine sterile needles, only half a centimeter, to depths of 3 to 7 millimeters.

The needles were manually stimulated with rotational movements for 30 seconds every 10 minutes during three sessions, remaining in place for 30 minutes before removal. Treatment was performed once a week for six consecutive months.

The results showed progressive and statistically significant improvement in pain reduction. Using the visual analog pain scale, where 0 represents no pain and 10 the worst pain imaginable, the researchers observed a 2-point decrease in pain intensity after three months of treatment. By the end of six months, the reduction was even more substantial, reaching 4.13 points on the pain scale. In addition to the significant reduction in pain, patients also showed improvement in their ability to open the mouth, returning to near-normal levels.

The rigorous statistical analysis, using tests appropriate for longitudinal studies, confirmed that these improvements were not coincidental but rather a direct result of acupuncture treatment. The findings align with previous studies demonstrating the benefits of acupuncture for orofacial pain conditions.

For patients suffering from jaw joint pain, these results offer a promising perspective. Acupuncture proved to be a safe and effective alternative to conventional treatments, such as occlusal splints, anti-inflammatory medications, or surgery. The mechanism of action of acupuncture involves the stimulation of specific nerve fibers that trigger the release of natural body substances, such as endorphins and other neurotransmitters, which promote pain relief and muscle relaxation. For healthcare professionals, the study suggests that acupuncture can be incorporated as part of a multidisciplinary treatment plan for TMD, especially in cases where the main cause is muscular.

The fact that it is a noninvasive treatment with low cost and few side effects makes acupuncture particularly attractive for implementation in public health services. In addition, the gradual improvement observed over time suggests that the benefits are long-lasting, not just temporary relief.

It is important to recognize the limitations of this study for an adequate interpretation of the results. The relatively small number of participants (15 people) limits the generalization of the findings to the broader population. The absence of a control group prevents direct comparisons with other treatments or with the natural course of the condition without intervention. In addition, the study did not evaluate long-term effects after discontinuation of treatment, leaving questions about the durability of the benefits.

Individual variability in response to acupuncture also represents a challenge, as some patients may need more or fewer sessions to achieve satisfactory results. Another important point is that acupuncture may be more effective for muscular problems than for structural changes in the joint, such as disc displacement or joint degeneration. Future studies with larger samples, control groups, and prolonged follow-up are needed to consolidate evidence on the efficacy of acupuncture in the treatment of TMD. Even with these limitations, the positive results of this study contribute to the growing body of evidence supporting the use of acupuncture as a valid and promising therapeutic option for patients with temporomandibular pain of muscular origin.