@akalsas - I have obstructive sleep apnea and use a CPAP device that helps me. I'm not sure I could use a dental device as I have a partial upper denture which I think would be an issue for me. There is another discussion that you might find helpful if you read through some of the posts by other members.

- Sleep apnea and potential treatments: https://connect.mayoclinic.org/discussion/apnea/

Here's an excerpt from the Mayo Clinic website on Obstructive sleep apnea - Diagnosis & treatment under the Therapies heading:
"Mouthpiece (oral device). Though positive airway pressure is often an effective treatment, oral appliances are an alternative for some people with mild or moderate obstructive sleep apnea. These devices may reduce your sleepiness and improve your quality of life.

These devices are designed to keep your throat open. Some devices keep your airway open by bringing your lower jaw forward, which can sometimes relieve snoring and obstructive sleep apnea. Other devices hold your tongue in a different position.

If you and your doctor decide to explore this option, you'll need to see a dentist experienced in dental sleep medicine appliances for the fitting and follow-up therapy. A number of devices are available. Close follow-up is needed to ensure successful treatment."
-- https://www.mayoclinic.org/diseases-conditions/obstructive-sleep-apnea/diagnosis-treatment/drc-20352095