The study below was conducted at the Pankey Institute for Advanced Dental Education
Results: The anterior bite stop has a significant effect in decreasing EMG activity for both clenching and grinding for the tested muscles, except the anterior digastric.
Clinical Implications:  The reduction of EMG activity by the anterior bite stop used in this study may be helpful during evaluation and treatment. 
How therapeutic use of an anterior bite stop can fail: 
The similarites and difference of an anterior bite stop versus an NTI-tss

STATEMENT OF PROBLEM: Patients are often treated for signs and symptoms in the masticatory musculature, which may be manifested as pain and/or conditions that cause difficulty in recording jaw relation records. A quick, easy method to alleviate these signs and symptoms would be helpful.  PURPOSE: This study measured the effect of a prefabricated anterior bite stop on the electromyographic activity of the anterior temporalis, posterior temporalis, masseter and anterior digastric during clenching,
and grinding tasks. MATERIAL AND METHODS: A prefabricated anterior bite stop was fabricated for 30 randomly selected subjects. Electromyographic surface electrodes were placed on the right and left sides of these muscles. Electromyographic activity was measured during clenching and grinding both with and without the anterior bite stop. RESULTS: The anterior bite stop had a significant effect in decreasing electromyographic activity for both clenching and grinding for all the tested muscles, except the anterior digastric. CONCLUSIONS: For this patient population, the ready-made anterior bite stop reduced electromyographic muscle activity for the anterior and posterior temporalis and the masseter muscles
during both clenching and grinding.