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J Orofac Pain. 2009 Fall;23(4):353-9.

Randomized clinical trial of acupuncture for myofascial pain of the jaw muscles.

Author information

1
Department of oral and Maxillofacial Surgery, Center for Orofacial Pain, University of California, San Francisco, San Francisco, CA 94143-0768, USA. yoshi.shen.ucsf@gmail.com

Abstract

AIMS:

To evaluate the effectiveness of acupuncture in treating symptoms associated with myofascial pain of the jaw muscles.

METHODS:

Twenty-eight subjects over the age of 18 and diagnosed with chronic myofascial pain of the jaw muscles were randomized to receive real (n = 16) or sham (n = 12) acupuncture. Prior to treatment, each subject clenched his or her teeth for 2 minutes. Acupuncture or sham acupuncture was then administered at the Hegu large intestine 4 (LI4) acupoint for 15 minutes. Real acupuncture was given by penetrating the needle through a sticky foam pad at the acupoint. Sham acupuncture was conducted by pricking the skin, without penetration, with a shortened, blunted acupuncture needle through a foam pad placed away from the acupoint. General head and neck pain ratings were obtained before and after treatment on a numerical rating scale. A mechanical pain stimulus on the masseter muscle was given before and after treatment and rated on a visual analog scale to measure pain tolerance level. Paired t tests were performed to detect significant changes in pain levels.

RESULTS:

Subjects receiving real acupuncture experienced a significant reduction in jaw pain (P = .04), jaw/face tightness (P = .04), and neck pain (P = .04), and a significant increase in pain tolerance of the masseter muscle (P = .001). Subjects were not able to determine whether they received real or sham acupuncture (P = .69). No significant pain reductions were observed in the sham acupuncture group.

CONCLUSION:

A single acupuncture session using one acupoint at Hegu large intestine 4 significantly reduced most myofascial pain endpoints when compared to sham acupuncture.

PMID:
19888488
PMCID:
PMC2894813
[Indexed for MEDLINE]
Free PMC Article
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