| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 3147505 | Journal of Endodontics | 2016 | 5 Pages |
•The effect of irrigant activation methods on the debridement of isthmus of mandibular molars was studied.•Histologic staining method was used.•Syringe irrigation, continuous warm activated irrigation and evacuation system, manual dynamic agitation (MDA), and passive ultrasonic irrigation (PUI) were compared.•CWAIS showed significantly better debridement than the other methods.•MDA was significantly better than PUI and syringe irrigation 1 and 3 mm from the apex.
IntroductionThis study aimed to evaluate the efficacy of a new irrigation system (EndoIrrigator Plus; Innovations Endo, Nasik, India) using a histologic method ex vivo.MethodsMandibular molars with a normal pulp extracted for periodontal reasons (N = 68) were assessed for the presence of an isthmus using cone-beam computed tomographic imaging. Root canals of the included molars (n = 40) were instrumented up to a ProTaper F2 instrument (Dentsply Maillefer, Baillagues, Switzerland) using 3% sodium hypochlorite as irrigant in a closed apical design. Final irrigation delivery/activation was performed as follows (n = 10): group 1, syringe irrigation; group 2, apical negative pressure delivery with continuous warm activated irrigation and evacuation system (CWAIS); group 3, manual dynamic agitation (MDA); and group 4, passive ultrasonic irrigation (PUI). Untreated teeth (n = 5) served as histologic controls. The isthmus regions (1, 3, and 5 mm from the apex) were analyzed by hematoxylin-eosin stain to calculate the percentage of remaining pulp tissue (RPT) relative to the area of the isthmus. Results were analyzed using the Mann-Whitney U test (P = .05).ResultsCWAIS showed significantly less RPT than the other groups at all 3 root levels (P < .05). MDA showed significantly less RPT at 1 and 3 mm from the apex compared with PUI and syringe irrigation (P < .05). There was no significant difference between PUI and MDA at the 5-mm level (P > .05).ConclusionsNone of the methods could completely clean the isthmus. CWAIS left behind the least amount of RPT.
