Results The total AOD(average optical density)value of HSP70 immunohistochemistry staining in odontoblasts from the aged group showed a significant decline.

• 结果年老组成牙本质细胞内总的HSP70免疫组化染色的平均吸光度值比年轻组降低,而胞质内HSP70免疫组化染色的平均吸光度值平均值比年轻组略高,但无显著性差异。