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By corroborating cross-sectional with longitudinal analyses, this study illustrates how cohort effects can confound trends over age and time. Mobility (walking difficulties) and edentulousness (toothlessness) were studied from 1968 to 2002 in a nationally representative panel aged 18–75 (5 waves, n ≈ 5,000) and ages 77+ at later waves (2 waves, n ≈ 500). Three analyses were done: cross-sectional 10-year...
A geographical sample in a rural area of eastern Guatemala revealed widespread, premature and heavy losses of permanent teeth. Social and environmental influences that affect tooth loss include inadequate diet, refined sugar, poor oral hygiene, absence of fluoride, lack of preventive education and insufficiency of dental care services. Land hunger and family poverty are of paramount importance....
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