In Vitro Evaluation of Push-out Bond Strength of Mineral Trioxide Aggregate at Middle third of the Root after One Week and 1and 2 Months

Document Type : Original Article

Authors

1 Department of Endodontics, Dental School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

2 Department of Endodontics, Dental School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

3 Private Practice

Abstract

Background and Objective: Severalmaterials are used for retrograde treatment and perforations repair. Mineral trioxide aggregate has been widely used as a promising biomaterial to repair root perforations because of its excellent biocompatibility, high sealing abilities, ability to set in the presence of blood and induction of dentin, bone and cement. The aim of this study was to evaluate the push-out strength of MTA-dentin in the middle third of the root.
Subjects and Methods: This in vitro study was performed on 60 human single-rooted teeth. After preparation, the specimens were randomly divided into 3 groups (n=20, for each period of assessment) and soaked in synthetic tissue fluid (STF) (pH= 7.4). The push-out bond strengths were then measured by using a universal testing machine after one week and 1and 2 months of  use. Data were analyzed by SPSS software (version 13) and ANOVA and Tukey statistical tests.
Results: Average push-out bond strength at the first week specimens was 2.3157 Megapascal which was more than the average after the first month (0.125) and two months (0.12). There were significant differences between the average push-out bond strength after one week,one  month and two month  (P<0.001).
Conclusion: With passage of time from one week to two months the push-out bond strength of MTA is decreased.

Keywords

References

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Jundishapur Scientific Medical Journal
Volume 13, Issue 3 - Serial Number 90
September and October 2014
Pages 257-263

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History

  • Receive Date: 02 February 2015
  • Revise Date: 22 February 2015
  • Accept Date: 15 March 2015

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