细菌引起牙髓和根周的感染已被广泛研究,学者们发现鼠的牙髓暴露于口腔微生物环境中,则牙髓全部坏死并且有根尖肉芽肿或脓肿形成;而无菌鼠的暴露牙髓并不失去活力,在牙髓中无脓肿形成,根尖也无肉芽肿形成,这充分说明细菌在牙髓和根周炎症中的作用。早年对由于创伤引起的死髓牙完整髓腔内无细菌感染的说法,由于学者们在 Bacteria cause pulp and root infection has been widely studied, scholars found that the dental pulp of mice exposed to oral microbial environment, the whole pulp necrosis and apical granuloma or abscess formation; and sterile rat teeth exposed The marrow does not lose its vitality, abscess formation in the pulp, apical granuloma formation, which fully demonstrates the role of bacteria in the pulp and perineal inflammation. Earlier on the dead marrow caused by trauma to the whole marrow cavity without bacterial infection of the argument, as scholars in