The effect of oral appliances in treating mild to moderate obstructive sleep apnea syndrome (OSAS) patientis found to be similar to continuous positive airway pressure in a study in 1955. Oral appliances make tongue or mandible forward position to increase airway space. Mandibular advancement devices and tongue retaining devices are oral appliances used in clinic today. Long term effects of oral appliances are discussed in three parts in this article: airway, dentition and temporomadibular joint. Total airway volume increases after using oral appliances. Overbite and overjet are found decreasing. Oral appliances cannot worsen the temporomadibular joint problems.
Liao, Hung-Hsiang; Yao, Chung-Chen Jane; Wang, Ya-Ting; Liu, Bi-Hui; Xiao, Xuan-Yi; and Hung, Min-Chin
"The Sixth Series of “Orthodontic Treatment’s Influence Over Upper Airway”: Different Designs and Long-term Consequences of Oral Appliance,"
Taiwanese Journal of Orthodontics: Vol. 26:
4, Article 3.
Available at: https://www.tjo.org.tw/tjo/vol26/iss4/3