Question

A 20-year-old resident of Andhra Pradesh presents with outward bending of the lower limbs and signs of osteoporosis. His diet mainly consists of rice and jowar roti. Which of the following intervention will not be helpful?

• A. Provision of running surface water for drinking
• B. Change the water source
• C. Fluoride supplementation
• D. Add lime and alum to drinking water

Hint:

In fluorosis, avoid extra fluoride. Management includes safe water source and defluoridation.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The patient from an endemic area (Andhra Pradesh) has outward bending lower limbs (Genu Valgum/Knock knees) and skeletal signs.
The combination of high-fluoride groundwater and a high Jowar (Sorghum) diet leads to Endemic Skeletal Fluorosis.
Step 2: Detailed Explanation:

Etiology: Chronic ingestion of excessive fluoride (usually $> 1.5$ mg/L) causes both dental and skeletal fluorosis.

The Jowar Connection: Diets high in Jowar can exacerbate fluorosis because Jowar is low in calcium (which normally inhibits fluoride absorption) and contains trace elements that may worsen the bone deformities.

Genu Valgum (Knock Knees): This specific deformity is a hallmark of skeletal fluorosis in children and young adults in these endemic regions.

Targeted Interventions: Management must focus on reducing fluoride load.

De-fluoridation (D): The Nalgonda technique (using Alum and Lime) removes fluoride from water.

Alternative Water (A & B): Changing from groundwater to surface water (rivers/canals) is helpful as surface water is naturally low in fluoride.


Why Option C is contraindicated: Since the entire pathology is caused by too much fluoride, giving Fluoride supplementation would be disastrous and would rapidly worsen the disease. This is the intervention that would not be helpful.

Step 3: Final Answer:
Fluoride supplementation is the only intervention listed that would be harmful in a patient already suffering from excessive fluoride toxicity.