PE-IMP004 - a cross-sectioned model showing peri-implant mucositis and peri-implantitis from early to advanced stage. The normal condition implant is shown on the left side. The crown of the left and middle implant is removable to show the subgingival condition (healthy and diseased). The mobile implant is at the moderate/advanced stage. An excellent model to explain that intervention in the earlier stage increases the possibility for full recovery.