Sleep Better AZ is Mesa, Arizona's expert sleep apnea dentist. Dr. Greg Manning and his team are passionate about helping you get the sleep you deserve, stay rested, and stay healthy by treating obstructive sleep apnea. Millions of Americans are living with undiagnosed sleep apnea and are at risk due to their poor sleep quality and the associated medical conditions linked with ongoing sleep apnea, such as heart attack, stroke, and diabetes.