[Objective]
The objective of this study was to assess the relationship between cognitive function and the toothbrushing behavior of older adults as evaluated by dental hygienists (DH).
[Subjects and Methods]
The subjects were 11 participants with a mean age of 75.5 ± 5.2 years. DH evaluated the participants’ toothbrushing behavior using the Cognitive Performance Test (CPT), while occupational therapists performed the Mini-Mental State Examination-Japanese (MMSE-J) and the Allen Cognitive Level Screen-5 (ACLS-5) assessments.
The CPT, based on Allen’s Cognitive Disabilities Model, was developed by occupational therapists and uses a 5-level scale to assess the participants’ ability to perform toothbrushing activities. The primary observation points were the duration of toothbrushing, the handling of the toothbrush and toothpaste, and actions like wiping the mouth.
[Results and Discussion]
Seven participants were rated at CPT Level 5.0: “Capable of performing independently without problems”, while four participants were rated at Level 4.4: “Capable of correcting mistakes with instructions, with some errors”. The MMSE-J identified one participant with suspected mild dementia and two with suspected mild cognitive impairment.
Participants with MMSE-J scores of 23 and 25 had ACLS-5 levels of 5.0 and 5.4, respectively, while their CPT levels were 4.4. These findings suggest that observing toothbrushing behavior allows DH to identify signs of cognitive decline.
[Conclusion]
It was concluded that DH can assess cognitive function by observation of toothbrushing behavior during oral hygiene guidance. Future studies are needed to include a larger sample size and to examine the CPT, developed from the perspective of occupational therapists.
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