This book speaks about treatment of dental fluorosis by microabration (prema) and bleaching by 35% hydrogen peroxide . prema is paste contains hydrochloric acid as 18% and other ingradients. the research was done in Sudan -Abogroon where school children age 9-12 were the participant of the study.Abogroon was been chosen because it is area of endemic fluorosis. two groups of the childern were suspected to the treatment selected randomly. The upper central incisors were the population of the study of each child.The group that treated by microabration are taken to the college of dentistry university of Khartoum where they treated .The other group is treated in abogroon each child three visits each visit nine minutes,time interval between visits was one week. This research is usefull for all people in the dental filed specially who are concerning with esthetic dentistry.