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Relationship between mastication and cognitive function in elderly in L'Aquila.

Patients with cognitive deficit have poor oral health and fewer teeth than cognitive normal elderly. The aim of the study was to investigate potential differences in masticatory function between elderly with dementia and those with normal cognitive function. Fifty-five patients (age >61; 82.05 ± 3.53) were enrolled in the study. Twenty-five subjects cognitively normal (10 females/15 males; 81.04 ± 4.89 years), were randomly selected and were assigned to Control Group. Thirty subjects (15 females/15 males; 83.16 ± 6.017 with cognitive impairments were randomly selected from hospitalized patients (Medically Assisted Residences RSA) and were assigned to Test Group. MMSE test, B-ADL and number of teeth were evaluated for each subject. The number of teeth in relation to levels of schooling is not resulted significative. In the cognitively impaired group 26 subjects had fewer than 20 teeth (86.6%); in the cognitively normal group 9 subjects had fewer than 20 teeth (36%). The correlation between number of teeth and age in both groups is significative (p<0.05). There is also a significative correlation between subjects with renal diseases and type II diabetes and number of teeth (p<0.05). Finally a significative correlation is present between number of teeth and sex of the patients (p<0.05) (Table 1). The results of the Wilcoxon's test revealed a significative correlation between MMSE in the two groups (p<0.01). There is also a significative correlation between the two groups and the educational background (p<0.01). The results of the study shows a clear correlation between tooth loss and cognitive function in elderly of L'Aquila.