Dental fluorosis is the result of chronic endogenic intake of fluorides in amounts exceeding the optimal daily dose of 1 ppm In our country different mineral waters with high content of fluorine are on the market. As a result in numerous regions and settlements the cases of fluorosis with different degrees of seriousness have become more frequent in recent years. The aim of this study is to test the application of hydrochloric acid-pumice abrasion for the removal of fluorosis stains and remineralisation of the enamel. At the Department of Children's dental medicine to the Medical university - Sofia 18 children aged 4 - 15 were treated for different degrees of fluorosis. The method of microabrasion was applied employing the ready-made product "Opalustre", and the remineralisation - employing Tooth Mousse. In the case of all chidren individual prophylactic programs were implemented, including motivation and training in oral hygiene, a food regimen and rules of carbohydrate intake, avoiding fluorine water, control of the local fluorine toothpastes used, etc. The treatment with microabrasion conducted and the subsequent remineralisation give very good results. These results include a recovery of the aesthetics of the teeth, remineralisation of the enamel, full disappearance of the enamel erosions and a dimimution of the dentine erosions.