J Prev Med Public Health.  2019 Sep;52(5):333-343. 10.3961/jpmph.19.163.

Association Between Dental Implants and Cognitive Function in Community-dwelling Older Adults in Korea

Affiliations
  • 1Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Suwon, Korea. yhlee@ajou.ac.kr
  • 2Institute on Aging, Ajou University Medical Center, Suwon, Korea.

Abstract


OBJECTIVES
This study aimed to evaluate the association between dental implants and cognitive function in community-dwelling older adults.
METHODS
Data were collected from the baseline survey (2016-2017) of the Korean Frailty and Aging Cohort Study. The study sample comprised 1115 community-dwelling people aged 70 years to 84 years who had 0-19 natural teeth. Dental implants and natural teeth were identified by panoramic radiography, while the cognitive function was assessed by the Korean version of the Mini-Mental State Examination (MMSE-KC). The association between dental implants and cognitive function was analyzed by multiple linear regression. Sensitivity analysis was performed to test for potential bias.
RESULTS
The mean number of natural teeth in the study population was 9.50 (standard deviation [SD], 6.42), and the mean MMSE-KC score was 24.93 (SD, 3.55). In the simple univariate analysis, tooth replacement, age, sex, smoking status, alcohol consumption, body mass index, osteoporosis, number of natural teeth, periodontitis, chewing discomfort, tooth-brushing frequency, education level, monthly household income, participation in economic activity, living alone, and marital status had a significant impact on the association. After adjusting for confounders, the association between dental implants and cognitive function remained significant (B, 0.85; standard error, 0.40; p<0.05). Age, body mass index, periodontitis, tooth-brushing frequency, and education level were also significantly associated with cognitive function. The results of the sensitivity analyses were consistent with those of the primary analysis.
CONCLUSIONS
Dental implants were associated with cognitive function in older adults living in the community. Dental implants as tooth replacements may play a role in preserving cognitive function.

Keyword

Dental implant; Cognition; Cognitive reserve; Prostheses and implants; Cognitive dysfunction; Aged

MeSH Terms

Adult*
Aging
Alcohol Drinking
Bias (Epidemiology)
Body Mass Index
Cognition*
Cognitive Reserve
Cohort Studies
Dental Implants*
Education
Family Characteristics
Humans
Korea*
Linear Models
Marital Status
Mastication
Osteoporosis
Periodontitis
Prostheses and Implants
Radiography, Panoramic
Smoke
Smoking
Surveys and Questionnaires
Tooth
Dental Implants
Smoke
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