Application of apical negative pressure irrigation in the nonsurgical treatment of radicular cysts: A case report

Figure 4 Root canal retreatment of tooth 47. A: The access cavity was opened directly on the inlay and the original filling were removed under a microscope; B: A self-made apical negative pressure irrigation system was used to drain the cystic fluid; C: During the preparation, 1% sodium hypochlorite and 0.9% normal saline were used together with the self-made apical negative pressure irrigation system for irrigation; D: Complete canal obturation was achieved via single cone technique; E: Image of the access cavity sealed glass ionomer; F: A final digital PAX revealed that the canals were well-obturated.