New study suggests poor dental health can elevate the risk of Alzheimer’s disease
A new study has suggested that poor dental health can elevate the risk of developing Alzheimer’s disease.
Researchers found that gum disease and tooth loss affect the area of the brain associated with memory, increasing the risk of cognitive decline and Alzheimer’s disease. The study indicates that periodontal disease, advanced gum disease, causes shrinkage of the brain tissue.
The study was conducted in Japan and involved 172 individuals with an average age of over 55 years old. At the start of the study, each participant was assessed, which included performing oral examinations as well as memory tests. At this point, none of the individuals displayed any signs of memory loss or cognitive decline. At four year intervals, the participants underwent repeat tests, including an MRI scan and dental checks.
The research team found that people who had fewer natural teeth without having advanced gum disease experienced a reduction in hippocampal volume. Among people who had periodontal disease, a greater hippocampal volume was detected in those with a higher number of natural teeth. Lead author, Dr Satoshi Yamaguchi, from Tohuku University Graduate School of Dentistry, explained that atrophy seems to be more pronounced in the left hippocampus of the brain in people who have Alzheimer’s disease. The left side of the brain is associated with memory and spatial awareness. Atrophy of the tissue is linked to memory loss.
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