Abstract
Fluorescence components were observed in thin-sections and extracts of human teeth by fluorometric methods. The fluorescence, being multiple, distributes in all the tooth tissue in different quality and quantity. An acidsoluble fraction (with a 5% perchloric acid) well corresponds in fluorescent components of dentine, cementum and enamel, while a fraction extracted with an alkaline ethylene-glycol is different in fluorescent composites between enamel and dentine, and the composites of dentine are quite similar to those of cementum. The relative fluorescence intensity at 530nm is the most intense in predentine, higher in dentine or cementum, and lower in enamel. The relative quantity seems less corresponding to ultraviolet absorption of tooth tissues.
