METHODOLOGY
The current study is a follow up study to evaluate the retention of sealants placed during a randomized control trial conducted in children of low socioeco- nomic class school of Karachi in January 2006.10 In that RCT, every third child in first to third standards was selected for the study. One hundred and eleven students aged 6-8 years were selected (56 were allo- cated to study group and 55 were allocated to control group) with fully erupted first permanent molar teeth excluding students with partially erupted first mo- lar.11 Six students from the study group and five students from control group were dropped out from study because of their parents’ reluctance in giving consent. After consent both groups received counsel- ing on dietary and tooth brushing habits. Students belonged to same socioeconomic class with academi- cally poor family background and almost similar di- etary pattern and living conditions. Fissure sealants were placed in 200 molars of 50 students in study group at a dental clinic associated with the school.12 In 2011, after five years, the retention of fissure sealants among study group was assessed. Study group was focused in the follow up study and no drop out was observed in the study group post-five years follow up. Two hundred molar teeth of 50 students were exam- ined in the same dental clinic for the presence of fissure sealants using light touch of explorer with the help of properly lit dental chair. First author (AH) was the