Effect of Post Length and Type of Luting Agent on the Dislodging Time of Metallic Prefabricated Posts by Using Ultrasonic Vibration Publisher Pubmed



Ebrahimi Dastgurdi M¹ ; Khabiri M¹ ; Khademi A² ; Zare Jahromi M¹ ; Hosseini Dastnaei P³
Source: Journal of Endodontics Published:2013

Abstract

Introduction: The purpose of this study was to determine and compare the times needed to dislodge prefabricated titanium posts of different luting lengths with various cements. Methods: Eighty-one intact extracted, single-canal human teeth were selected and endodontically treated. Specimens were randomly divided into 9 groups, which were arranged according to the post space length (5, 7, and 9 mm) and cement type (zinc phosphate, glass ionomer, and resin cement). Titanium posts were cemented into the post spaces, and after 1 week of storage they were subjected to ultrasonic vibration. The dislodging times were recorded and analyzed by using the Kruskal-Wallis and Mann-Whitney tests (P <.05). Results: A significant difference was observed between the dislodging times on the basis of post length and luting agent (P <.001). There were also significant differences between different cements luted with the same length posts (P <.001). Significant differences were observed between the 5-mm posts and both the 7- and 9-mm posts for each cement, but the differences between the 7-mm and 9-mm posts were not significant (P <.05). Conclusions: Changes in the cement type and post length alter the time required to dislodge a post with an ultrasonic device. © 2013 American Association of Endodontists.