SEM AND EDS -ANALYSES ON ENAMEL TEETH IN STARTING PHASE OF CIRCULAR CARIES.

Circular caries occurs in the early childhood (1-1.5 year), immediately after the eruption of deciduous teeth. Considering the fact that early detection and treatment on circular caries is the key to complete elimination, the aim of this research is the early diagnosis of circular caries in the initial stage by examining the ultrastructural changes and changes of mineral compose calcium and phosphorus (Ca and P) in starting phase of circular caries -initial lesion, white spot (macula alba), before and after topical fluoride treatment. For laboratory trials realization, the primary incisors were extracted during their physical change and three groups of deciduous teeth samples were formed: I group - the testing group of ten untreated extracted maxillary incisors with initial lesion, II group- a control group of twenty extracted healthy mandibular incisors and group III - the testing group of ten extracted maxillary incisors with initial lesion, treated with topical fluoride preparation. The laboratory examinations were completed within the Institute of Medical Diagnostics and Research in the Biomedical and Natural Sciences, at the Faculty of Medicine in Nis, Serbia, with Scanning Electron Microscope (EDS) and Energy Dispersed Spectrometer (EDS). In this trial we conducted ultrastructural changes and changes of tested minerals (Ca and P) in enamel of three teeth samples groups. Results showed a significant effect of topical fluoride treatment indicating significant remineralization process in the initial lesion. The conclusion was that the early detection of initial lesion is very important because the early caries process in the fluoride presence can be completely stopped or reversed (biological repair). [ABSTRACT FROM AUTHOR]