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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
Authors
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Authors Affiliations
  1. 1. Department of Endodontics, School of Dentistry, I.A.U. Khorasgan Branch, Isfahan, Iran
  2. 2. Department of Endodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Dental Public Health, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

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.
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