Fluoride Action Network


146 patients with bone fluorosis were collected from endemic areas (100 from Yangyuan county of Hebei province and 46 from Beijing suburbs). X-rays of the chest, spinal column, pelvis, elbow, forearm, knee joint and leg bones were taken in every case. The drinking water fluorine content was also determined. All patients were followed up once a year for 3 years. Our investigation revealed that in different areas with similar drinking water fluorine content, X-ray findings of bone fluorosis were significantly different. Some cases presented mainly rarefaction whereas others had mainly malacia. For further research into this problem, we observed the principal X-ray changes of bone fluorosis and its pathologic basis.