Which disclosing solution differentiates between mature and newly formed plaque:
**Core Concept**
The question is testing the ability to differentiate between mature and newly formed plaque, which is a critical aspect of dental and medical history taking. The disclosing solution used for this purpose works by staining the plaque or biofilm, allowing for its visualization and identification.
**Why the Correct Answer is Right**
The correct disclosing solution is **C. Basic Fuchsin**, also known as Basic Fuchsin solution. This solution is based on the principle that basic dyes are selectively taken up by the bacteria in newly formed plaque, whereas mature plaque is stained by acid dyes. The basic fuchsin solution is a type of acid-fast stain that is used to differentiate between the two types of plaque. The solution stains the bacteria in newly formed plaque a deep red or pink color, making it easily visible.
**Why Each Wrong Option is Incorrect**
* **Option A:** is not a correct disclosing solution for differentiating between mature and newly formed plaque.
* **Option B:** is not a relevant disclosing solution for this purpose.
* **Option D:** is also not a correct disclosing solution for this purpose.
**Clinical Pearl / High-Yield Fact**
When using basic fuchsin solution, it's essential to note that the results should be interpreted in conjunction with other clinical findings, such as patient history and oral examination. A high level of plaque accumulation is often associated with an increased risk of periodontal disease.
**Correct Answer:** C. Basic Fuchsin solution.