Complete loss of teeth: a newly identified risk factor for Alzheimer?s Disease ? The Neuburg Dementia Trial
Geriatric-Rehabilitation-Center, Neuburg an der Donau, Germany.
Objective: Do patients with Alzheimer?s disease have fewer teeth than patients without dementia? 
Method: 1038 patients were checked for the number of remaining teeth, the Mini-Mental-State (MMS) and the Barthelindex (Barthel). Using ICD-10-criteria, Alzheimer?s disease (N=124), Vascular dementia (N=34) and both types of dementia simultaneously (N=26) were diagnosed.
Results: Patients diagnosed with severe Alzheimer?s disease (MMS<=20,Barthel<=70,average age83.3;N=69) averaged 0.2 teeth.
Patients diagnosed with mild Alzheimer?s disease (MMS>20,Barthel>70,age82.2;N=55) averaged 1.5 teeth. Patients of the same age with no signs of dementia (MMS>25,age82.9;N=20) averaged 4.7 teeth.
Patients diagnosed with Vascular dementia were younger (age78.4) and averaged 6.9 teeth. By comparison, the 99 patients with cerebral infarction had 6.7 teeth left (age78.4).
Conclusions: Patients diagnosed with severe Alzheimer?s disease showed a 20-fold increase in tooth loss compared to controls (0.2 versus 4.7 teeth, respectively; p<0.0001).
As sugar-rich diet is a well established cause of caries [2,3], this might suggest that lifelong better nutritional habits may help to avoid Alzheimer?s disease .
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Ein neu entdeckter Schutzfaktor vor Alzheimer-Demenz: Zahlreiche noch erhaltene Zähne – Die Neuburger Demenzstudie