*The buccal side is the condition in the oral cavity, and the tongue side can be compared and explained with dental discs. *Classification model of most acute oral periodontal disease: This model shows the pathological conditions of different stages of simple gingivitis of periodontitis of mild, moderate and severe chronic periodontitis, and also shows alveolar bone resorption caused by occlusal trauma. *This model model is also a good instructional tool that can be used for dental demonstrations at dental colleges and universities. *This is a good model for dental education and health care, so children can be important for teeth.