Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements
Background and Aims: In case of nonsurgical endodontic re-treatment or replacing a restoration, one of the best methods for removing post from the canal is using an ultrasonic vibration. The aim of this study was to evaluate the effect of ultrasonic vibration time on the retention of post luted wi...
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doaj-9feb805d413a4b2da02987c36993214b2020-11-25T00:17:48ZfasTehran University of Medical SciencesJournal of Dental Medicine1024-641X2008-24442015-01-01274265271Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cementsDastnaei Peimaneh Hosseini 0Dastgurdi Maziar Ebrahimi 1 Background and Aims: In case of nonsurgical endodontic re-treatment or replacing a restoration, one of the best methods for removing post from the canal is using an ultrasonic vibration. The aim of this study was to evaluate the effect of ultrasonic vibration time on the retention of post luted with zinc phosphate or glass ionmer cements. Materials and Methods: 96 sound extracted lower premolars were selected. The coronal section of specimen was removed and the roots were endodontically treated. A 9-mm post space was prepared in each specimens and a stainless steel Parapost XP was cemented into the post space. Half of the specimens were cemented with the Zinc phosphate cement and the other by g lass ionomer cement. After 7 days of storage, both groups were equally divided into 4 subgroups of 12 teeth. Control group did not receive any treatment. The other subgroups subjected to ultrasonic vibration for 4, 8 or 12 minutes. The retention of all specimens was evaluated and data were analyzed using ANOVA and Tukey tests. Results: In control (no ultrasonic) group and 4 minute ultrasonic group, the retention of posts luted with Zinc phosphate cement were not significantly differen t from those luted with g lass ionomer cement. (P=0.372). On the other hand , applying of ultrasonic vibration for 8 and 12 minutes in zinc phosphate and 12 minutes in g lass ionomer caused a significant reduction in the retention of posts (P=0.01). Conclusion: Although, the initial retention of two cements was not different, the ultrasonic vibration had more catastrophic effect on zinc phosphate in comparison to glass ionomer. http://jdm.tums.ac.ir/browse.php?a_code=A-10-25-768&slc_lang=en&sid=1Ultrasonics Zinc phosphate cement Glass ionomer cement Retention |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Dastnaei Peimaneh Hosseini Dastgurdi Maziar Ebrahimi |
spellingShingle |
Dastnaei Peimaneh Hosseini Dastgurdi Maziar Ebrahimi Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements Journal of Dental Medicine Ultrasonics Zinc phosphate cement Glass ionomer cement Retention |
author_facet |
Dastnaei Peimaneh Hosseini Dastgurdi Maziar Ebrahimi |
author_sort |
Dastnaei Peimaneh Hosseini |
title |
Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
title_short |
Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
title_full |
Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
title_fullStr |
Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
title_full_unstemmed |
Effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
title_sort |
effect of ultrasonic vibration time on the retention of prefabricated posts luted with two different cements |
publisher |
Tehran University of Medical Sciences |
series |
Journal of Dental Medicine |
issn |
1024-641X 2008-2444 |
publishDate |
2015-01-01 |
description |
Background and Aims: In case of nonsurgical endodontic re-treatment or replacing a restoration, one of the best methods for removing post from the canal is using an ultrasonic vibration. The aim of this study was to evaluate the effect of ultrasonic vibration time on the retention of post luted with zinc phosphate or glass ionmer cements. Materials and Methods: 96 sound extracted lower premolars were selected. The coronal section of specimen was removed and the roots were endodontically treated. A 9-mm post space was prepared in each specimens and a stainless steel Parapost XP was cemented into the post space. Half of the specimens were cemented with the Zinc phosphate cement and the other by g lass ionomer cement. After 7 days of storage, both groups were equally divided into 4 subgroups of 12 teeth. Control group did not receive any treatment. The other subgroups subjected to ultrasonic vibration for 4, 8 or 12 minutes. The retention of all specimens was evaluated and data were analyzed using ANOVA and Tukey tests. Results: In control (no ultrasonic) group and 4 minute ultrasonic group, the retention of posts luted with Zinc phosphate cement were not significantly differen t from those luted with g lass ionomer cement. (P=0.372). On the other hand , applying of ultrasonic vibration for 8 and 12 minutes in zinc phosphate and 12 minutes in g lass ionomer caused a significant reduction in the retention of posts (P=0.01). Conclusion: Although, the initial retention of two cements was not different, the ultrasonic vibration had more catastrophic effect on zinc phosphate in comparison to glass ionomer. |
topic |
Ultrasonics Zinc phosphate cement Glass ionomer cement Retention |
url |
http://jdm.tums.ac.ir/browse.php?a_code=A-10-25-768&slc_lang=en&sid=1 |
work_keys_str_mv |
AT dastnaeipeimanehhosseini effectofultrasonicvibrationtimeontheretentionofprefabricatedpostslutedwithtwodifferentcements AT dastgurdimaziarebrahimi effectofultrasonicvibrationtimeontheretentionofprefabricatedpostslutedwithtwodifferentcements |
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