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Recent study tests if replacements for missing teeth lower the risk of poor cognition - Video

Published On 2023-03-21T09:15:00+05:30  |  Updated On 21 March 2023 1:49 PM IST
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Overview

A recent study aimed to find out if missing teeth replacement with fixed prostheses may protect against cognitive decline. The study was presented at the 52nd Annual Meeting & Exhibition of the AADOCR, in conjunction with the 47th Annual Meeting of the CADR. The AADOCR/CADR Annual Meeting & Exhibition took place at the Oregon Convention Center in Portland on March 15-18, 2023.

The study by Elizabeth Kaye of Boston University examined 577 men in the VA Normative Aging Study (NAS) and Dental Longitudinal Study. Tooth status and type of replacement, if any, were recorded at triennial dental exams (1969-2001). Masticatory efficiency was assessed with carrot chewing tests. The Spatial Copying Task (SCT) was administered up to four times between 1995 and 2001. The investigators defined poor cognition as any weighted SCT score <13 (lowest tertile of initial SCT scores in all NAS participants). Tooth-level Cox proportional regression, accounting for clustering within individuals, estimated the hazard of poor cognition, adjusted for education, epilepsy medication use, and time-varying values of tooth status (present, absent, fixed bridge/implant, removable replacement), age, cigarette smoking, and coronary heart disease.

The mean age at initial cognitive testing was 68±7 years. Forty-five percent of men had at least one low SCT score. Twenty-nine percent of participants lost no teeth during follow-up, 34% lost teeth that were not replaced, 13% had missing teeth subsequently replaced with fixed prostheses, and 25% had missing teeth replaced with removable prostheses. New fixed prostheses were associated with a lower hazard (HR=0.72, 95%CI=0.52-0.99) of poor cognition while new removable prostheses were associated with a higher hazard (HR=1.26, 95% CI=1.01-1.56). Loss of a tooth with no replacement was not associated with a significantly higher hazard (HR=1.05 95% CI=0.91-1.21) of poor cognition. Masticatory ability declined 6% in men with new fixed prostheses compared to 9%, 10%, and 13% in men with no tooth loss, new removable prostheses, and tooth loss but no replacement, respectively.

The study found that the replacement of missing teeth with fixed prostheses may protect against cognitive decline, and conservation of masticatory ability may play a role in the protective association.

Reference:

Elizabeth Kaye et al,INTERNATIONAL ASSOCIATION FOR DENTAL RESEARCH.

Speakers

Isra Zaman

B.Sc Life Sciences, M.Sc Biotechnology, B.Ed

Isra Zaman is a Life Science graduate from Daulat Ram College, Delhi University, and a postgraduate in Biotechnology from Amity University. She has a flair for writing, and her roles at Medicaldialogues include that of a Sr. content writer and a medical correspondent. Her news pieces cover recent discoveries and updates from the health and medicine sector. She can be reached at editorial@medicaldialogues.in.
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