H-E staining showed that the control group had more pycnotic periodontal ligament, orderly fibres, and flatter alveolar bone than the model group.

• H-E染色结果显示与拔牙大鼠相比，正常对照组大鼠牙周膜结构较致密，纤维排列有序，牙槽骨骨壁较平。