Research Paper Volume 13, Issue 6 pp 7943—7952
Association between cognitive health and masticatory conditions: a descriptive study of the national database of the universal healthcare system in Japan
- 1 Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, MA 02115, USA
- 2 Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA
- 3 Oral Health Policy and Epidemiology, Harvard School of Dental Medicine, Boston, MA 02115, USA
- 4 DMD Candidate, Harvard School of Dental Medicine, Boston, MA 02115, USA
- 5 Iwate Medical University, School of Dental Medicine, Japan
Received: January 23, 2021 Accepted: March 5, 2021 Published: March 19, 2021https://doi.org/10.18632/aging.202843
How to Cite
Copyright: © 2021 Silva et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Cognitive health is subject to decline with increasing numbers of lost teeth which impacts mastication. This study is a descriptive data analysis of the association between masticatory and cognitive conditions using a large database. We obtained the dental and medical records from Japan's universal healthcare system (UHCS) from the national database in 2017. The data from 94% of the Japanese population aged 65 and over is included. It is inclusive of diagnostic codes for various types of cognitive impairment, as well as dental treatment records from 2012 to 2017. The cognitive impairment group was compared to those without a diagnosis of cognitive impairment. Crude odds ratio between loss of mastication with natural teeth (exposure) and cognitive impairments (outcome) were compared. Patients who have lost masticatory function are likely to have cognitive impairment with an odds ratio of 1.89 (p<0.0001) for early elderly (aged 65-75) and 1.33 (p<0.0001) for advanced elderly (over 75). Patients who are edentulous and function with complete dentures are likely to have cognitive impairment with an odds ratio of 2.38 (p<0.0001) and 1.38 (p<0.0001), respectively. The data shows a convincing and significant result of an association between cognitive health and oral health, related to masticatory conditions.