Oral Health and Frailty in Aging Populations

Oral health and frailty are intimately linked through a web of biological, functional and social pathways. As people age, loss of teeth, diminished chewing and swallowing function, periodontal inflammation and dry mouth can compromise nutritional intake and accelerate muscle decline. These changes contribute to weight loss, diminished strength and reduced physical resilience, hallmark features of frailty. Conversely, systemic frailty can undermine oral hygiene and access to dental care, creating a vicious cycle of declining oral and overall health. Globally, an ageing population places oral health at the forefront of strategies to delay disability, prevent hospitalisation and reduce mortality. Practical interventions include routine screening of chewing and swallowing function, prosthetic rehabilitation, tailored dietary counselling and public education to preserve masticatory performance, maintain dentition and foster awareness of oral frailty.

Research from Nature Portfolio

Recent studies have demonstrated a strong link between awareness of oral frailty and actual oral function among community-dwelling adults. A large cross-sectional survey found that individuals with greater knowledge of oral frailty were less likely to exhibit early signs of oral dysfunction as measured by an eight-item frailty index. Awareness correlated with demographic factors (age, gender, region), exercise and dietary habits, and conscious oral-health behaviours. These findings suggest that public-health campaigns and targeted education could play a pivotal role in preventing the onset of oral frailty and its contribution to broader physical decline.

Oral Health and Frailty in Aging Populations publication trend

The graph below shows the total number of articles in oral health and frailty in aging populations across all publications each year (not limited to Nature Index journals).

Technical terms

Frailty: A clinical syndrome in older adults marked by reduced strength, endurance and physiological reserve, leading to vulnerability to adverse health outcomes.

Oral frailty: Age-related decline in oral functions such as chewing, swallowing and tongue mobility, which predisposes to nutritional impairment and physical frailty.

Oral hypofunction: A state defined by multiple impaired oral signs or symptoms—including reduced occlusal force, poor oral hygiene, dryness, weakened tongue and lip function and diminished swallowing capacity.

Masticatory performance: The objective ability to break down food by chewing, often quantified by the efficiency or force of mastication.

Dysphagia: Difficulty or discomfort in swallowing, which can lead to aspiration and nutritional compromise.

References

1. Relationship between risk of oral frailty and awareness of oral frailty among community-dwelling adults: a cross-sectional study. Scientific Reports (2024).
2. Effect of oral health on functional disability and mortality in older adults in Japan: a cohort study. The Lancet Healthy Longevity (2024).
3. Association between self-reported difficulty in chewing or swallowing and frailty in older adults: A retrospective cohort study. GeroScience (2024).
4. Association between Masticatory Performance, Nutritional Intake, and Frailty in Japanese Older Adults. Nutrients (2023).
5. Oral hypofunction in the older population: Position paper of the Japanese Society of Gerodontology in 2016. Gerodontology (2018).