Which of the following is NOT a dental caries classification or risk assessment system?

CAMBRA, ICDAS, and Caries Risk Assessment tools are all systems used to classify, detect, and assess caries risk to guide preventive and treatment decisions. The DMFT (Decayed, Missing, Filled Teeth) Index is an epidemiological tool used to measure the prevalence and extent of caries in populations - it is an experience index, not a classification or risk assessment system. The original question's answer of 'none of the above' was incorrect because the answer choice options listed did not include DMFT. This question has been corrected with a proper distractor.