In a periodontal exam, BOP stands for which term?

• A. Bleeding on Palpation
• B. Bleeding on Perio Probe
• C. Bleeding on Probing
• D. Bleeding on Imaging

Answer: (C)

Bleeding on probing is the clinical sign looked for during a periodontal exam. When the clinician gently inserts a periodontal probe into the gingival sulcus or pocket around each tooth, bleeding that occurs from the tissue is noted as positive BOP. This response indicates active gingival inflammation and helps assess disease activity, prognosis, and treatment needs. It’s specifically tied to the probing action, not to palpation of tissues or imaging studies, which assess tenderness or internal structures rather than the sulcus bleeding response.