展示了牙周病初期的单纯性牙龈炎到轻、中、重度的慢性牙周炎各阶段的病理状态及咬合创伤引起的牙槽骨吸收。
Performance of the initial simple gingivitis to periodontal
disease mild, moderate and severe chronic periodontitis
in various stages of the pathological state, and demonstrated
with alveolar bone loss caused by traumatic occlusion.