机理探究 Preve度版ntiveDentistry.ppt

Preventive Dentistry Teaching Research Section of Preventive Dentistry Section 4 Epidemiology of Periodontal Disease Index for periodontal condition OHI-S PLI GI CPI CPI probe Gingival bleeding Subgingival calculus PD （4 ） CPI 15 years old 1 Area Developing Vs Developed countries Rural Vs Urban 2 time 3 population age gender male female race oral hygiene smoking（duration、frequency、type） nutrition systemic diseases Section 5 Epidemiology of Other Oral Diseases Other oral diseases epidemiology Oral cancer Dental fluorosis Cleft lip and palate Dentofacial anomalies Oral mucosal diseases Oral cancer China 0.7，Thailand 4.6，India 12.6 /100,000 District: one of the most common tumor in east south Asia Time, age Gender: male female Race Oral cancer District Time, age Gender: male female Race Dental fluorosis Dean’s index Based on the 2 most severely affected teeth (record the status if they are the same and record the less severe if they are not) Dental fluorosis Dental fluorosis Fci = ( n×W ) / N Fci=〔(0.5× Questionable)+(1× Very mild )+…+(4× Severe )×100％〕/ N Dental fluorosis Public health significance Dental fluorosis Feature of distribution area urban, rural age dentition Cleft lip and palate One Cleft lip or palate case per 500～700 infants factors Cleft lip and palate area urban, rural gender Section 6 Oral Health Survey Evaluation The survey and evaluation of oral health Purpose Item Index Method Sample size Error and prevention Item General item Oral health assessment Questionnaire Questionnaire data collection Collect information that cannot be observed. Index Caries---- Periodontal diseases---- Dental fluorosis---- Methods Census（普查）----a complete enumeration of the umits to be studied (mass examination) ?: no sampling error ?: not practical, time consuming Sampling --measurements on part of the population ? --less r