Dr. Erela Katz Rappaport delves into sleep and cognition, with an eye for clinical responsibility and opportunities for leadership in prevention.
by Erela Katz Rappaport, DMD, D.ABDSM
As dental sleep practitioners, we understand that the airway is not just a mechanical pathway for breathing, it is central to neurologic, cardiovascular, and systemic health. Increasingly, evidence is pointing to a powerful triad: oral health, sleep health, and cognitive function. For those of us practicing at the intersection of airway dentistry and systemic wellness, this connection provides both a clinical responsibility and an opportunity for leadership in prevention.
The Inflammatory Burden: Oral Health and Neurodegeneration
Chronic oral inflammation – particularly from untreated periodontitis – acts as a systemic inflammatory burden that may play a direct role in the pathogenesis of dementia. Studies have identified periodontal pathogens such as P. gingivalis in the brain tissue of Alzheimer’s patients, where they appear to promote amyloid production and tau protein hyperphosphorylation (Dominy et al., Science Advances, 2019).
As DSM clinicians, many of us are already evaluating inflammation during oral exams. By incorporating discussions about cognitive risk when we observe signs of chronic periodontitis, we can help patients understand that resolving oral inflammation isn’t just about saving teeth — it’s about protecting the brain.
Airway Obstruction and the Sleep- Cognition Link
Sleep-disordered breathing (SDB) — including OSA and UARS – can severely impair glymphatic clearance, oxygenation, and memory consolidation. Neuroimaging studies show that untreated OSA is associated with cortical thinning, hippocampal atrophy, and accelerated neurodegeneration (Yaffe et al., Neurology, 2011).
In my practice, airway screening is routine. We use structured interviews, CBCT, and sleep studies (home or in-lab) to evaluate airway patency. When OSA is diagnosed, oral appliance therapy (OAT) is a powerful tool – not only to reduce AHI, but to restore the sleep architecture necessary for neurocognitive resilience. We regularly educate patients on how fragmented or hypoxic sleep may be contributing to daytime brain fog, poor memory, or early cognitive decline.
Beyond AHI: Why Our Role Is Expanding
It’s important to remember that many patients with cognitive complaints fall outside traditional OSA thresholds. They may have UARS, positional or REM-related obstruction, or simply poor tongue posture and compensatory mouth breathing. For these cases, a more comprehensive DSM approach — including myofunctional therapy, nasal breathing optimization, and collaborative care such as CBTi — is essential.
We’ve seen patients who “pass” their sleep study but wake unrefreshed and cognitively dull. When we address tongue ties, collapsed lateral walls, or oral dysfunction, we often see significant improvement in subjective sleep quality, energy, and focus.
Cognitive Risk as a Communication Tool
Educating patients about the sleep-brain connection opens new doors. Discussing Alzheimer’s prevention may be far more motivating for a middle-aged patient than treating snoring or clenching. By reframing OAT, myofunctional therapy, and inflammation control as part of a broader brain health strategy, we create context for deeper patient engagement and long-term follow-through.
In my office, we routinely explain how sleep and oral inflammation affect brain aging. We align treatment goals not just with AHI reduction, but with enhanced oxygenation, reduced arousals, and long-term cognitive protection. This holistic message resonates deeply — especially among health-conscious adults, caregivers, and high performers.
Leading the Charge in Brain-Based Dentistry
The dental sleep community is uniquely positioned to contribute meaningfully to cognitive health prevention. We have the tools, the training, and the access to detect airway dysfunction early — often years before neurocognitive symptoms appear. By integrating airway, inflammation, and brain function into our diagnostic thinking, we shift from reactive care to proactive prevention.
In short, we don’t just help patients sleep better — we help them think clearer, age slower, and live fuller.
Sleep and cognition, chronic illness, cancer, heart disease — read about how patients with disorders such as these need clinicians who understand that communication is key to their treatment. Click here to read “They are Not Their Disease: Clinician and Providers Need to Feel That,” here: https://dentalsleeppractice.com/they-are-not-their-disease-clinician-and-providers-need-to-feel-that/.