弗素の歯牙に対する作用に就いての実験的研究続報象牙質変化に就いての電子顕微鏡的検索

抄録

As already reported, the intravenous injection of fluoride solution causes the formation of a characteristic dentin layer in rabbits. But it has been not found the definite mechanism on this and then the author investigated this question by electron microscopy.
Visible changes were recognized when the dentin was etched with weak acid, therefore the detailed structures of the normal and decalcified dentin has been able to proved in electron micrographs.
The fluorine dentin layer has been observated as the decreasing region of acid solubility under the light microscope but revealed nothing by electron microscope. It is believed this reason that the decalcified surface structure of dentin is not different from the normal structure. Namely it is not indicated the fluoride deposits in the dentin fluorine layer.
In future it is advisable to differentiate the crystalline composition of the fluorine layer and the normal layer by electron or X-ray diffraction.