They had a full - mouth clinical examination of six sites per tooth and answered a structured written questionnaire .
Susin 2004 examined a representative sample of 853 dentate individuals in Brazil who were selected by a multistage probability sampling method .
individuals had a full - mouth clinical examination of six sites per tooth and answered a structured written questionnaire .
Susin 2004 examined a representative sample of 853 dentate individuals in Brazil who were selected by a multistage probability sampling method .