Are Oral Appliances as effective as Nasal CPAP in controlling positional Sleep Apnea?
A study is cited in the current Journal of Clinical Sleep Medicine showing equal benefits for positional sleep apnea (apnea that is worse in when sleeping on your back vs sleeping on your side).
Research is exploding regarding the efficacy of oral appliances in treating sleep apnea. Customized, adjustable oral appliances are being shown to be as effective as CPAP in many well-researched studies.
So which treatment is best?

No.
Dentistry has traditionally used plastic appliances (splints and nightguards) to fit over the teeth and protect them from the damaging effects of bruxing (grinding the teeth) and clenching (pressing the teeth). Known as nightguards, splints, and bitegurds, they have been traditionally used while sleeping because much of the damage occurs while sleeping.
Here is a great resource that showcases 9 symptoms that may indicate you have sleep apnea.
A study done in Brazil at the Dental College wanted to find out. In 68 people seen for TMJ problems, they evaluated the ability of acupuncture to help with the
A recent study from the Mayo Clinic shows that the route of insomnia is caused by sleep apnea.

