Keywords NMA;permanent magnetic body;root canal seal bacteriostasis;jaw bone tissue reaction;cytotoxicity;periapical lesion;root canal therapy;

• 新型磁性胶体根管充填料;永磁体;根管封闭;抑菌作用;颌骨组织反应;细胞毒性;尖周病变;根管治疗术;