The DentoNeural Axis: A Piezo channel-mediated mechanosensory pathway linking tooth loss to cognitive decline

Two independent meta-analyses-one of 18 cohort studies ( n = 356,297) and one dose-response analysis of 14 longitudinal studies ( n = 34,074)-demonstrate dose-dependent associations between tooth loss and dementia. The latter reported hazard ratio (HR) 1.48 (95% CI 1.18-1.87) for cognitive impairment and HR 1.28 (95% CI 1.09-1.49) for dementia; the former reported relative risk (RR) 1.20 and 1.15 for the same...

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✦ The floor

Discussion

Signed responses from readers of the wire.

✦ Clinical Takeaway ✦

No actionable change for audiologists; this mechanistic review is relevant to researchers studying sensory loss and cognitive decline, but does not provide direct evidence for audiology clinical practice at this time.

✦ Why It Matters ✦

If confirmed, a mechanosensory pathway linking tooth loss to cognitive decline would broaden the emerging science connecting peripheral sensory loss — potentially including hearing loss — to dementia risk, with implications for cross-disciplinary screening.

✦ Key Points ✦

01Proposes a novel 'DentoNeural Axis' linking tooth loss to cognitive decline via Piezo mechanosensory channels.
02Draws on data from large longitudinal cohort studies to support the mechanistic model.
03Published in Aging Brain; represents a meta-analytic and mechanistic review.
04Piezo channels are ion channels that respond to physical pressure or mechanical force in tissues.
05Relevant to wider sensory deprivation and cognitive decline research, including audiology-adjacent dementia science.

✦ Claims & Evidence ✦

ClaimEvidenceSupport

Tooth loss is linked to cognitive decline via a Piezo channel-mediated mechanosensory pathway.

studypartially supported

Large longitudinal cohort data support an association between tooth loss and cognitive decline.

studypartially supported

✦ Research metadata ✦

PMID: 42861096
DOI: 10.1016/j.nbas.2026.100169.
Journal: Aging Brain
Publication type: meta_analysis
Evidence level: 2a
Population: Adults from large longitudinal cohort studies; data on tooth loss and cognitive outcomes
Intervention: Tooth loss (mechanosensory deprivation via Piezo channels)
Comparator: Adults with intact dentition

Primary outcomes

Cognitive decline measures; Association between tooth loss and dementia risk

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