Which index specifically assesses bleeding on probing?

• A. Gingival Bleeding Index
• B. Gingival Index
• C. Sulcus Bleeding Index
• D. OHI-S

Answer: (C)

Bleeding on probing is a direct response of the gingival sulcus to gentle probing, so the index used to quantify this specific response must target sulcal bleeding. The Sulcus Bleeding Index is built precisely for this purpose: it evaluates the presence and extent of bleeding that occurs when the probe is inserted into the gingival sulcus, providing a direct measure of sulcular inflammation. That focused aim makes it the most appropriate choice for assessing bleeding on probing.

In contrast, the Gingival Bleeding Index also assesses bleeding but is not limited to sulcal sites and can be used in broader bleeding assessments; the Gingival Index looks at color, contour, and consistency with bleeding as one factor rather than a dedicated BOP measure; and the OHI-S assesses plaque and calculus, not bleeding.