Recently, western physicians have urged that electrically stimulated acupuncture should replace needles. The use of acupuncture in dentistry is rare. Peter Teng, DDS, of the New York Society of Acupuncture for Physicians and Dentists believes that acupuncture may relieve chronic jaw pain. I believe your son will be comfortable using a local anesthetic like lidocaine when his cavity is treated. If the cavity is small and shallow, no anesthetic will be required.
Acupuncture is a fascinating therapy that is underutilized in western medicine.
It is not warranted for standard cavity treatment, however. Nauta et al. Shigeru et al. Shimura et al. Yonehara et al.