“…DS children develop to a plateau in their adolescence which attain overall learning abilities equivalent to unaffected children aged 6 to 8 years. Knowing that oral hygiene of 6-year-old are not as good as 8-12 year-old children (Sandström et al, 2011), the anticipated oral hygiene of DS subjects would not be ideal if no special extra attention is given. Moderate to mild mental retarded individuals are on the other hand, mobile, function and perform well and highly motivated in sheltered workshop (Crespi, 1993).…”