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Association between mastication and cognitive status: A systematic review
1Department of Health Science, Hyogo University, 2301 Shinzaike Hiraoka-cho, Kakogawa, Hyogo 675-0195, Japan.
Archives of Gerontology and Geriatrics
|January 3, 2017
Summary
Chewing ability is linked to better cognitive function and lower dementia risk in older adults. This review highlights the importance of maintaining good mastication for brain health in the elderly population.
Area of Science:
- Gerontology
- Neuroscience
- Dental Science
Background:
- Cognitive impairment and dementia are significant health concerns in the elderly.
- Masticatory dysfunction is a potential risk factor, but its link to cognition requires clarification.
Purpose of the Study:
- To systematically review literature on the association between mastication and cognitive function in the elderly.
- To examine the relationship between mastication and dementia incidence in older adults.
Main Methods:
- Searched five electronic databases (PubMed, EMBASE, CINHL, Cochrane Library, Pro Quest) for studies published 2005-2015.
- Included English-language studies assessing mastication and cognition/dementia in individuals over 40.
- Analyzed 33 articles (22 cross-sectional, 11 prospective cohort) for design, conclusions, and evidence strength.
Main Results:
- Poorer mastication correlated with lower cognitive function in 15/17 cross-sectional studies.
- Poorer mastication was linked to steeper cognitive decline in 5/6 prospective studies.
- Mastication deficiency was a risk factor for dementia or mild memory impairment (MMI) in 4/5 cross-sectional and 4/5 prospective studies.
Conclusions:
- Evidence suggests a positive association between mastication and cognitive function in the elderly.
- Maintaining adequate masticatory function may be important for preserving cognitive health and reducing dementia risk.
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