后牙大面积髓底穿孔和前牙根管旁穿，在牙修科临床上并不少见。在临床上，患者除表现为一般根尖周炎症状外，穿孔处可见牙周损害，通过检查及X线片可准确作出诊断。这类患者若得不到及时有效的治疗，最终将被拔除。因此，我们通过用银汞合金充填重建髓室底的方法，对此类牙患进 Large area of ​​posterior pulp perforation and anterior root canal perforation, in the clinical orthodontics is not uncommon. Clinically, in addition to the performance of patients with general periapical symptoms, perforation can be seen at the periodontal damage, by examination and X-ray can accurately make a diagnosis. If such patients do not receive timely and effective treatment, will eventually be removed. Therefore, we treated this type of tooth by filling the floor with amalgam