CPI Index — NDEB AFK MCQ
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Correct answer: C — Community Periodontal Index (CPI)
The Community Periodontal Index (CPI, formerly CPITN) is the WHO-recommended index for assessing periodontal status and treatment needs in epidemiological surveys. It uses the WHO probe (ball-ended, 0.5 mm) to assess sextants, scoring: 0 = healthy, 1 = bleeding on probing, 2 = calculus or overhanging restorations, 3 = shallow pockets (4-5 mm), 4 = deep pockets (≥6 mm). Treatment needs are coded: TN0 = no treatment, TN1 = oral hygiene instruction, TN2 = scaling, TN3 = complex periodontal treatment. It is simple, rapid, and standardised for population comparisons.
Reference: WHO – Oral Health Surveys: Basic Methods, 5th ed., 2013