The jaw clenching and teeth clenching and grinding that you do when sleeping can be destructive. It can lead to destroyed teeth, not to mention the sore jaw and other issues due to your jaw clenching and grinding. There are many remedies on the market for bruxism. One of the most effective and least invasive is hypnosis, as shown by several jaw clenching research studies.
For example, a study for bruxism (the technical term for your teeth and jaw clenching) by Oregon Health Sciences University, School of Dentistry, Portland found that hypnosis was indeed an effective means to stop your jaw and teeth clenching. In this study, subjects who were experiencing jaw clenching and teeth grinding had hypnotherapy sessions for bruxism. At the end of the study, both EMG recordings and self-reports showed that there was a significant decrease in the tooth grinding and jaw clenching. In fact, in the 3-year follow-up, it was found that the teeth clenching had continued to be stopped.
Source: Suggestive hypnotherapy for bruxism at night: a pilot study.