Chronic Stress and Oral Health: How Stress Worsens Periodontitis

A recent study from Advanced Science (Luo et al., 2023) investigates the connection between chronic stress and the worsening of periodontitis, an inflammatory disease of the gums. The results show that chronic stress – simulated by a chronic restraint stress model – causes the dysregulation of eicosapentaenoic acid (EPA), an anti-inflammatory fatty acid, in the oral microbiome. This leads to increased polarization of M1 macrophages, which fuel pro-inflammatory processes and thus worsen periodontitis.

The Role of Stress in the Inflammatory Cascade

The study clarifies how chronic stress disrupts the balance in the oral microbiome. Eicosapentaenoic acid, which normally has anti-inflammatory effects, is impaired in its function under stress conditions. At the same time, stress promotes overactivity of the sympathetic nervous system (part of the autonomic nervous system), which further fuels the inflammatory response via M1 macrophages. This leads to chronic inflammation in the gum tissue, increasing the risk of periodontitis and tooth loss.

Connection to the Psychophysiological Interaction Model

In the context of Jürg Hösli's psychophysiological interaction model, it becomes clear how closely the psyche, body, and nutrition are linked. Chronic stress activates the cortisol axis, which not only promotes systemic inflammation but also affects local processes such as oral health. The dysregulation of EPA also shows how metabolic bottlenecks – here at the level of fatty acids – are exacerbated by psychological stress. A disturbed sympathetic/parasympathetic balance, measurable for example via heart rate variability (HRV), could be an early indicator of such processes.

What Does This Mean for Everyday Life?

The study emphasizes that oral health cannot be viewed in isolation but is a reflection of the overall psychophysiological balance. Chronic stress, often caused by professional or private burdens, can thus have direct effects on gums and teeth via the inflammatory axis. Particularly alarming: untreated periodontitis increases the risk of systemic diseases such as cardiovascular problems.

Practical Recommendations

• Stress Management: Techniques such as meditation, breathing exercises, or moderate exercise can promote parasympathetic activity and calm the stress axis.
• Dietary Adjustments: A diet rich in omega-3 fatty acids (e.g., fatty fish, walnuts) could support the anti-inflammatory effect of EPA. Individualized approaches are crucial here, as not every metabolism reacts the same way to food components.
• Oral Hygiene: Regular brushing and flossing are essential to maintain the microbiome in the mouth.