Background. Dementia is a multi-etiologic syndrome characterized by multiple cognitive deficits but not always by the presence of cognitive impairment. Cognitive impairment is associated with multiple non-modifiable risk factors but few modifiable factors. Epidemiological studies have shown an association between periodontitis, a potentially modifiable risk factor, and cognitive impairment.Objectives. To determine whether clinical periodontitis is associated with the diagnosis of cognitive impairment/dementia after controlling for known risk factors, including age, sex, and educational level.Methods. A case-control study was conducted in Granada, Spain, in two groups of dentate individuals over 50 years of age: cases with a firm diagnosis of mild cognitive impairment or dementia of any type or severity, and controls with no subjective memory loss complaints and a score >30 in the "Phototest" cognitive test (screening test for cognitive impairment). Periodontitis was evaluated by measuring tooth loss, plaque and bleeding indexes, pocket depths, and clinical attachment loss.Results. The study included 409 dentate adults, 180 with cognitive impairment and 229 without. A moderate and statistically significant association was observed between clinical attachment loss and cognitive impairment after controlling for age, sex, educational level, oral hygiene habits, and hyperlipidemia (p=0.049). No significant association was found between tooth loss and cognitive impairment.Conclusion. Periodontitis appears to be associated with cognitive impairment after controlling for confounders such as age, sex, and educational level. KEY WORDS.Periodontitis, periodontal attachment loss, mild cognitive impairment, dementia.Dementia is a multi-etiologic syndrome characterized by the acquired involvement of multiple cognitive/behavioral domains that compromise the sufferer's functional capacity 1 . It largely affects the elderly, although it can commence at any age 1 . Mild cognitive impairment is an intermediate state, frequently appearing before the development of dementia, in which the cognitive and behavioral impairment is not sufficiently severe to have functional repercussions 2 . The main cause of dementia is Alzheimer's Disease (AD), a neurodegenerative process of multifactorial and complex etiology associated with multiple risk and protective factors; its prevalence increases exponentially with age from 65 years on, and it represents one of the main socio-health problems faced by the developed world 3 . It is estimated that there will be 35.6 million individuals with dementia worldwide in 2010 and that this number will double every 20 years, reaching more than 115 million by 2050 1 . The magnitude of the challenge and the 1 Journal of Periodontology; absence of curative treatments make the development of preventive measures a matter of extreme urgency. Although many risk factors are non-modifiable (e.g., age, sex, and genetic risk factors), others are susceptible to modification through individual choices, e.g., certain dieta...

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The control of bacterial dental plaque through daily oral hygiene is essential to prevent oral diseases such as caries or periodontal disease, especially in at-risk populations, including the elderly with mild cognitive impairment and dementia. The aim of this study was to determine the association between different levels of cognitive impairment and dementia in an elderly population and their capacity to maintain adequate oral hygiene. A case-control study (elderly with versus without mild cognitive impairment or dementia) was performed in Granada, Spain. Outcome variables were tooth/prosthesis-brushing frequency/day, bacterial plaque index, and gingival bleeding index. Statistical models were adjusted by age, sex, educational level, and tobacco and alcohol habits. The study included 240 cases and 324 controls. The final model, adjusted by age, sex, educational level, and tobacco and alcohol consumption, showed a significant association between degree of cognitive impairment and daily oral hygiene, accumulation of bacterial plaque, and gingival bleeding. In summary, deficient daily oral hygiene, evidenced by greater bacterial dental plaque accumulation and gingival inflammation, is independently associated with cognitive impairment, even at its earliest stage.

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BackgroundTo assess and compare the effectiveness and costs of Phototest, Mini Mental State Examination (MMSE), and Memory Impairment Screen (MIS) to screen for dementia (DEM) and cognitive impairment (CI).MethodsA phase III study was conducted over one year in consecutive patients with suspicion of CI or DEM at four Primary Care (PC) centers. After undergoing all screening tests at the PC center, participants were extensively evaluated by researchers blinded to screening test results in a Cognitive-Behavioral Neurology Unit (CBNU). The gold standard diagnosis was established by consensus of expert neurologists. Effectiveness was assessed by the proportion of correct diagnoses (diagnostic accuracy [DA]) and by the kappa index of concordance between test results and gold standard diagnoses. Costs were based on public prices and hospital accounts.ResultsThe study included 140 subjects (48 with DEM, 37 with CI without DEM, and 55 without CI). The MIS could not be applied to 23 illiterate subjects (16.4%). For DEM, the maximum effectiveness of the MMSE was obtained with different cutoff points as a function of educational level [k = 0.31 (95% Confidence interval [95%CI], 0.19-0.43), DA = 0.60 (95%CI, 0.52-0.68)], and that of the MIS with a cutoff of 3/4 [k = 0.63 (95%CI, 0.48-0.78), DA = 0.83 (95%CI, 0.80-0.92)]. Effectiveness of the Phototest [k = 0.71 (95%CI, 0.59-0.83), DA = 0.87 (95%CI, 0.80-0.92)] was similar to that of the MIS and higher than that of the MMSE. Costs were higher with MMSE (275.9 ± 193.3€ [mean ± sd euros]) than with Phototest (208.2 ± 196.8€) or MIS (201.3 ± 193.4€), whose costs did not significantly differ. For CI, the effectiveness did not significantly differ between MIS [k = 0.59 (95%CI, 0.45-0.74), DA = 0.79 (95%CI, 0.64-0.97)] and Phototest [k = 0.58 (95%CI, 0.45-0.74), DA = 0.78 (95%CI, 0.64-0.95)] and was lowest for the MMSE [k = 0.27 (95%CI, 0.09-0.45), DA = 0.69 (95%CI, 0.56-0.84)]. Costs were higher for MMSE (393.4 ± 121.8€) than for Phototest (287.0 ± 197.4€) or MIS (300.1 ± 165.6€), whose costs did not significantly differ.ConclusionMMSE is not an effective instrument in our setting. For both DEM and CI, the Phototest and MIS are more effective and less costly, with no difference between them. However, MIS could not be applied to the appreciable percentage of our population who were illiterate.