Sleep apnea is a condition most people associate with snoring and daytime fatigue not with dentistry. But the connection between sleep-disordered breathing and oral health runs in several directions and dentists are increasingly playing a role in both identifying sleep apnea risk and providing treatment options.
What dentists can observe that suggests sleep apnea
Tooth grinding patterns. Sleep bruxism and sleep apnea have a complex bidirectional relationship. Bruxism during sleep occurs more frequently in people with obstructive sleep apnea. Current thinking is that bruxism may be a protective mechanism with jaw movement helping reopen the airway when oxygen saturation drops. Severe unusual bruxism patterns particularly in someone without obvious stress-related drivers warrant sleep apnea screening.
Scalloping of the tongue. When the tongue is pushed against the teeth repeatedly as happens when it is too large for the oral cavity or positioned posteriorly during sleep the dental ridges leave impressions on the tongue edges. This scalloped tongue appearance is associated with enlarged tongue and is a risk factor for obstructive sleep apnea.
Dry mouth and associated signs. Mouth breathing which is extremely common in sleep apnea patients causes significant dry mouth overnight with predictable consequences including accelerated calculus formation, higher cavity rates, and increased gum disease. A patient with unexplained high cavity rates despite reasonable hygiene or with severe morning dry mouth may be a mouth breather due to undiagnosed sleep apnea. Our dry mouth and oral health article covers this fully.
How sleep apnea affects oral health
The dry mouth from mouth breathing is probably the most direct impact. Sleep apnea is also strongly associated with gastroesophageal reflux disease. The negative intrathoracic pressure created by breathing against a partially obstructed airway promotes acid reflux which then reaches the oral cavity and erodes enamel from inside-facing tooth surfaces. The characteristic erosion pattern of upper front teeth on the tongue-facing side is one diagnostic marker for chronic acid exposure that may have a sleep apnea-related origin.
Dental treatment options for sleep apnea
Oral appliance therapy with custom-fitted devices that advance the lower jaw forward keeping the airway more open during sleep is an evidence-based alternative to CPAP for mild-to-moderate obstructive sleep apnea and for people who cannot tolerate CPAP. These are made by dentists with training in dental sleep medicine.
Educational content. If you suspect sleep apnea the appropriate evaluation is a sleep study. Dental management of sleep apnea requires assessment by a dentist trained in sleep medicine.
