GB 17018-2011Division of endemic fluorosis areas (English PDF)

4.1 Ward determination

4.1.1 Water type endemic fluorosis

Drinking water fluoride content of > 1.2mg/L, and 8 years old to 12 years old live-born children of local dental fluorosis prevalence of > 30%.

4.1.2 Pollution from coal burning endemic fluorosis

Residents have open stove fired furnace open habit, native-born and 8 years old to 12 years old living in child dental fluorosis prevalence of > 30%.

4.1.3 Tea type endemic fluorosis

16+ population daily intake of fluorine tea > 3.5mg, and confirmed by X-ray examination in patients with skeletal fluorosis.

4.2 Degree ward division

4.2.1 Drinking water and coal burning endemic fluorosis

4.2.1.1 Mild Ward

Local 8 years old to 12 years old live-born children with moderate prevalence of dental fluorosis and <=20%, or by X-ray examination confirmed mild Skeletal fluorosis patients but not in patients with moderate to severe bone disease fluorine.

4.2.1.2 Moderate Ward

Native-born living in the age of 8 to 12 year olds with moderate prevalence of dental fluorosis and > 20% and <=40%, or by X-ray examination certificate Real have moderate or severe bone disease in patients with fluorine, but severe skeletal fluorosis prevalence <=2%.

4.2.1.3 Severe Ward

Local 8 years old to 12 years old live-born children with moderate prevalence of dental fluorosis and > 40%, or by X-ray examination confirmed severe fluorine Bone disease prevalence > 2%.

4.2.2 Tea type endemic fluorosis

4.2.2.1 Mild Ward

X-ray examination, 36 years of age to 45 years of age and older people do not moderate skeletal fluorosis occurs.

4.2.2.2 Moderate Ward

X-ray examination, 36 years of age to 45 years of age and older crowd moderate skeletal fluorosis prevalence <=10%.

4.2.2.3 Severe Ward

X-ray examination, 36 years of age to 45 years of age and older crowd moderate skeletal fluorosis prevalence > 10%.

Method 5

5.1 Diagnosis indexing dental fluorosis, according to WS/T 208 requirements execution.

5.2 fluoride in drinking water and tea sample collection and preservation, performed in GB/T 5750.2 requirements.

5.3 fluoride in drinking water and tea Determination of fluorine content, according to GB/T 5750.5 requirements for execution.

5.4 endemic skeletal fluorosis diagnosis, according to WS192 requested the Executive.

Determination of 5.5 index, see Appendix A.

Appendix A

(Normative)

Evaluation Determination A.1 people daily tea intake of fluorine in the village of Ward proposed determination, samples were collected from tea and water samples 10 families, measuring the amount of tea and fluorine content of fluoride in drinking water, and tune Check all the household resident population over the age of 16 the average daily drinking water, people were calculated daily intake of fluorine tea, all people resident in the 10 Daily tea intake port of fluorine calculated arithmetic mean. The formula shown in Equation (A.1).

Person tea daily fluoride intake amount (mg) = [tea fluorine concentration (mg/L) - water fluoride concentration (mg/L)] × people daily drinking water (L) (A.1) A.2 The prevalence of dental fluorosis Ward village in the proposed determination to check the age of 8 to 12 year olds living in the teeth of all native-born, calculate the prevalence of dental fluorosis. meter See calculation formula of formula (A.2).

The prevalence of dental fluorosis = the number of persons with mild to moderate to very light Headcount severe Number of subjects × 100% (A.2) A.3 X line prevalence of skeletal fluorosis in the village of Ward proposed determination, the target population for all shooting pelvis, right forearm and right leg plus plus elbow knee and other parts of the X-ray Piece of bone X-ray changes, calculated X-ray skeletal fluorosis prevalence see equation (A.3).

X-ray skeletal fluorosis prevalence = Skeletal fluorosis number of X-ray examination confirmed Number of subjects × 100% (A.3)