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    Comparison of various irrigation activation procedures after post space preparation on push-out bond strength of fiber posts: an in vitro study
    (Pagepress Publ, 2021) Akbulut, Merve Ozguven; Ozbay, Yagiz; Erdemir, Ali
    Aim: To compare the effectiveness of various irrigation activation methods applied after post space preparation on the push- out bond strengths of fiber posts to root canal dentin. Materials and Methods: Twenty maxillary central incisor teeth were prepared and root-filled. Following the preparation of the post spaces, the teeth were randomly allocated to 5 groups (n=4) based on the irrigation activation method. Post spaces were irrigated with 2.5% NaOCl and 17% EDTA and various irrigation activation techniques were applied in each group as follow. Group 1: conventional syringe irrigation (CSI); Group 2: manual-dynamic activation (MDA); Group 3: negative apical pressure (EndoVac); Group 4: passive ultrasonic irrigation (PUI) and Group 5: Er,Cr:YSGG laser. Subsequent to fiber post placement, the samples were transversally sectioned and push-out tests were applied for measurement of the bond strength of fiber posts. Results: Irrigation activation with Er,Cr:YSGG laser, EndoVac and PUI resulted higher push-out bond strength in comparison to MDA and CSI (P<.05). Conclusions: Irrigation activation with EndoVac, PUI and Er,Cr:YSGG laser provides superior bonding strength for fiber posts.