Best retention options for avoiding re-opening of bite for a patient with bruxism?

After 3 years of braces, my open bite is closed, but I am worried that it will relapse! I have upper & lower bonded retainers, plus upper and lower Essix retainers (but these seem to stimulate my bruxism). Is there a better option for me? As background, I had a splint for many years for night grinding. According to several dentists, the splint caused my teeth to move & eventually they only contacted on the wisdom teeth, so my anterior open bite extended from 2nd molar to 2nd molar on each side.

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