The arrangement of odontoblasts was found in line and there was no inflammation.The root pulp and periodontal tissue were normal.

• 周边造牙本质细胞排列整齐，牙髓无炎症及变性，根髓及牙周组织正常，最终形成牙本质桥将穿髓孔封闭使牙髓保存了活力。