Figure 7
From: Influence of pure fluorides and stannous ions on the initial bacterial colonization in situ
Representative TEM images visualize the pellicle’s ultrastructure. Intraoral exposure time: 8 h. All pellicles show an electron-dense basal layer. This basal layer is covered by a varying less electron-dense granular and globular layers (a, b, control). There are distinct ultrastructural differences detectable after rinsing with pure fluoride solutions (c–f) compared to the control (a,b). (c,d) Amine fluoride: An increased thickness of the less electron-dense granular and globular layer is detectable. (e,f) Stannous fluoride: A higher electron density of the basal layer with stannous precipitates (arrow) can be observed. The enamel was removed during processing of the specimens, the former enamel side is marked with an asterisk.
