Nalgonda technique is related to ?
**Core Concept**
The Nalgonda technique is a water fluoridation method used to prevent dental caries in communities. It involves the addition of sodium fluoride to the drinking water supply to achieve a specific fluoride concentration that promotes oral health without causing fluorosis.
**Why the Correct Answer is Right**
The Nalgonda technique was developed by a team of scientists from the Indian Council of Medical Research (ICMR) in Nalgonda, a town in the state of Telangana, India. This method involves the addition of sodium fluoride to the water supply at a concentration of 0.5-1.0 ppm (parts per million) to prevent dental caries. The sodium fluoride is added to the water at a specific point in the distribution system to ensure uniform mixing and to prevent the formation of fluoride precipitates.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Nalgonda technique is not related to the use of fluoride varnishes or gel in dental practice. While fluoride varnishes and gel are effective in preventing dental caries, they are not part of the Nalgonda technique.
**Option B:** This option is incorrect because the Nalgonda technique is not related to the use of fluoride toothpaste or mouthwash. While these products contain fluoride, they are not part of the Nalgonda technique, which involves the addition of fluoride to the drinking water supply.
**Clinical Pearl / High-Yield Fact**
The Nalgonda technique is a community-based approach to preventing dental caries, and it has been successful in reducing the incidence of dental caries in many communities around the world. The technique is particularly useful in areas where access to dental care is limited.
**Correct Answer:** D.