Results The X-ray changing of fluorosis in Ewenke county were bone hypodense,osteoporosis and joint degeneration,appearing high frequeney different from drinking water and burning coal area.

• 结果鄂温克旗饮茶型氟骨症X线表现以骨质稀疏骨密度低、皮质薄和骨关节退行性改变出现频率较高,不同于饮水型及燃煤型病区。