Figures 1–6. Figure 1. A large microgap is present at the level of the implant shoulder (reflected light microscopy, original magnification ×12). Figure 2. Higher magnification of the previous slide. Spaces are present between abutment and implant and between implant and screw (reflected light microscopy, original magnification ×50). Figure 3. Low-magnification examination of a screw-retained implant retrieved after a loading period of 2 years. A scarce longitudinal adaptation between implant and abutment is present (reflected light microscopy, original magnification ×12). Figure 4. Higher magnification of the previous slide. Signs of damage are present at the implant-abutment interface (reflected light microscopy, original magnification ×20). Figure 5. Screw-retained abutment. Voids are present between implant and abutment. Biological fluids are present in these spaces. The contact between implant and abutment is limited to a few points (reflected light microscopy, original magnification ×100). Figure 6. Screw-retained abutment. Few contact points between implant and abutment are present (reflected light microscopy, original magnification ×50). Figure 7. Cement-retained abutment. The cement fills the spaces between implant and abutment (reflected light microscopy, original magnification ×12)