This fact is from Dental Indices in Public Health Dentistry. It is a commonly tested concept in NEET MDS examinations. Understanding this fact is crucial for answering MCQs correctly.
DMFT = permanent teeth decayed missing filled
deft = primary teeth decayed extracted filling indicated filled
OHI-S = Greene and Vermillion simplified = DI-S plus CI-S
CPI = Community Periodontal Index WHO probe
PI = Plaque Index Silness and Loe
Russells PI = Periodontal Index epidemiological.