The Epidemiology of Dental Caries Department of Preventive Dentistry School Hospital of Stomatology Wuhan University Minquan Du杜民权
The Epidemiology of Dental Caries Department of Preventive Dentistry School & Hospital of Stomatology Wuhan University Minquan Du 杜民权
Types of study Descriptive studies:cross-sectional, longitudinal,historical Analytical studies:case-control, cohort Experimental study:Clinical trials, Intervention,fields trials
Types of study ❖ Descriptive studies: cross-sectional, longitudinal, historical ❖ Analytical studies: case-control, cohort ❖ Experimental study: Clinical trials, Intervention, fields trials
龋病流行病学指数 An Index is a graduated,numerical scale with upper and lower limits,with scores in the scale corresponding to specific criteria 指数：表明某种现象变动的程度。指标作用或 批示作用的标识。 用数值级差作标准，测量和比较疾病的扩展 范围和严重程度
An Index is a graduated, numerical scale with upper and lower limits, with scores in the scale corresponding to specific criteria 指数:表明某种现象变动的程度。指标作用或 批示作用的标识。 用数值级差作标准，测量和比较疾病的扩展 范围和严重程度。 龋病流行病学 指数
An Ideal Index 简单 Simplicity 价廉 Acceptability 冬有效 Validity ”可靠 Reliability 敏感 Sensitivity 统计学方法处理Quantifiability
An Ideal Index ❖ 简单 Simplicity ❖ 价廉 Acceptability ❖ 有效 Validity ❖ 可靠 Reliability ❖ 敏感 Sensitivity ❖ 统计学方法处理 Quantifiability
可逆性指数：reversible 菌斑指数 gingivitis 累积性指数：cumulative DMF.dental caries
❖可逆性指数: reversible 菌斑指数 gingivitis ❖累积性指数: cumulative DMF, dental caries
Scale for measurement Nominal scale:Orthodontic angles classification Marital status:single,married,divorced,windowed Colour of hair:red,yellow,black,green Types of Blood:O,A,B,AB Ordinal scale:plaque index;Gingival Index,CPI Years of education:0,1-5,6-9,>10 Severity of disease:mild,moderate,severity Interval:temperature in Celsius temperature 22 and 26,32 and 36 Ratio:weight,mortality rate,DMFT
Scale for measurement ❖ Nominal scale：Orthodontic angles classification Marital status: single, married, divorced, windowed Colour of hair: red, yellow, black, green Types of Blood: O, A, B , AB ❖ Ordinal scale： plaque index; Gingival Index, CPI Years of education: 0, 1-5, 6-9, >10 Severity of disease: mild, moderate, severity ❖ Interval： temperature in Celsius temperature 22 and 26, 32 and 36 ❖ Ratio： weight, mortality rate, DMFT
Examine equipment Artificial light Dental mirror CPI probe
Examine equipment ❖ Artificial light ❖ Dental mirror ❖ CPI probe
3mm A specially designed light weight CPI probe with a 3mm 0.5-mm ball tip is used, 11.5mm with a black band between 2mm 3.5 and 5.5 mm and between 8.5 and 11.5 mm from the ball tip 3mm 0.5mm
A specially designed light weight CPI probe with a 0.5-mm ball tip is used, with a black band between 3.5 and 5.5 mm and between 8.5 and 11.5 mm from the ball tip
Oral Health Surveys 4th Edition Code Conditions Primary teeth Permanent teeth Crown Crown Root A 0 0 Sound B 1 1 Decayed C 2 2 Filled,with decay D 3 3 Filled,no decay E 4 Missing
Oral Health Surveys 4th Edition Code Conditions Primary teeth Permanent teeth Crown Crown Root A 0 0 Sound B 1 1 Decayed C 2 2 Filled, with decay D 3 3 Filled, no decay E 4 - Missing
第三次全国口腔健康流凉学雕 是来e阴新根 2005.4.21