Figure 4. In vivo experiments in rats. PMMA discs were coated with Pre-(PGA-PLL)₂₀-PGA-PLL^FITC film, by an automated dipping process, to ensure a full coating (A) and were sutured to the rat’s cheek (B). The CSLM image (115 x 115 µm) of the disc surfaces after 4 days in the rat’s mouth, showing the film still intact and entirely covering the disc on the mucosal side (C), while only fragments are visible on the lingual side of the specimen (D). Scale bars: 10 µm.