Natural History of Periodontal Diseases 1.1 Epidemiology of Periodontal Diseases
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چکیده
1 CHAPTER 1: NATURAL HISTORY OF PERIODONTAL DISEASES 1.1 EPIDEMIOLOGY OF PERIODONTAL DISEASES 1.1.1. Methodological issues 1.1.1.1 Epidemiology—fundamental aspects Epidemiology, according to general definition, deals with the study of determinants of the occurrence of health-related conditions with the scope to identify the alterable causes and apply findings to control the problem (MacMahon & Trichopoulos, 1996). A central theme of epidemiology is the distinction between causal and non-causal statistical association between categories of events.
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