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Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste

OBJECTIVES: This study aimed to assess the effect of storage time and temperature on dimensional stability of impressions made with Cavex Outline zinc oxide impression paste. MATERIALS AND METHODS: A round stainless steel mold with five grooves (three horizontal and two vertical) was used in this in...

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Autores principales: Habibzadeh, Sareh, Safaeian, Shima, Behruzibakhsh, Marjan, Kaviyani, Parisa, Kharazifard, Mohamadjavad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Tehran University of Medical Sciences 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376546/
https://www.ncbi.nlm.nih.gov/pubmed/28392816
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author Habibzadeh, Sareh
Safaeian, Shima
Behruzibakhsh, Marjan
Kaviyani, Parisa
Kharazifard, Mohamadjavad
author_facet Habibzadeh, Sareh
Safaeian, Shima
Behruzibakhsh, Marjan
Kaviyani, Parisa
Kharazifard, Mohamadjavad
author_sort Habibzadeh, Sareh
collection PubMed
description OBJECTIVES: This study aimed to assess the effect of storage time and temperature on dimensional stability of impressions made with Cavex Outline zinc oxide impression paste. MATERIALS AND METHODS: A round stainless steel mold with five grooves (three horizontal and two vertical) was used in this in-vitro experimental study. Cavex Outline impression paste was prepared according to the manufacturer’s instructions and applied to the mold. The mold was placed on a block and stored at 35°C and 100% humidity for setting. The impressions were poured with stone immediately and also after 30, 120, 240 and 420 minutes and 24 hours. The distance between the vertical lines on the casts was measured and compared with that in the immediately poured cast. RESULTS: Storage in a refrigerator and at room temperature for zero to seven hours had no significant effect on dimensional stability of the impressions; however, 24 hours of storage in a refrigerator or at room temperature decreased the dimensional stability of Cavex Outline (P=0.001). Also, a significant association was found between dimensional changes following 24 hours of storage in a refrigerator (4°C) and at room temperature (23°C; P<0.01). CONCLUSIONS: The optimal pouring time of Cavex Outline impressions with stone is between zero to seven hours, and 24 hours of storage significantly decreases the dimensional stability.
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spelling pubmed-53765462017-04-07 Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste Habibzadeh, Sareh Safaeian, Shima Behruzibakhsh, Marjan Kaviyani, Parisa Kharazifard, Mohamadjavad J Dent (Tehran) Original Article OBJECTIVES: This study aimed to assess the effect of storage time and temperature on dimensional stability of impressions made with Cavex Outline zinc oxide impression paste. MATERIALS AND METHODS: A round stainless steel mold with five grooves (three horizontal and two vertical) was used in this in-vitro experimental study. Cavex Outline impression paste was prepared according to the manufacturer’s instructions and applied to the mold. The mold was placed on a block and stored at 35°C and 100% humidity for setting. The impressions were poured with stone immediately and also after 30, 120, 240 and 420 minutes and 24 hours. The distance between the vertical lines on the casts was measured and compared with that in the immediately poured cast. RESULTS: Storage in a refrigerator and at room temperature for zero to seven hours had no significant effect on dimensional stability of the impressions; however, 24 hours of storage in a refrigerator or at room temperature decreased the dimensional stability of Cavex Outline (P=0.001). Also, a significant association was found between dimensional changes following 24 hours of storage in a refrigerator (4°C) and at room temperature (23°C; P<0.01). CONCLUSIONS: The optimal pouring time of Cavex Outline impressions with stone is between zero to seven hours, and 24 hours of storage significantly decreases the dimensional stability. Tehran University of Medical Sciences 2016-06 /pmc/articles/PMC5376546/ /pubmed/28392816 Text en Copyright© Dental Research Center, Tehran University of Medical Sciences This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
spellingShingle Original Article
Habibzadeh, Sareh
Safaeian, Shima
Behruzibakhsh, Marjan
Kaviyani, Parisa
Kharazifard, Mohamadjavad
Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title_full Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title_fullStr Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title_full_unstemmed Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title_short Effect of Storage Time and Temperature on Dimensional Stability of Impressions Made with Zinc Oxide Impression Paste
title_sort effect of storage time and temperature on dimensional stability of impressions made with zinc oxide impression paste
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376546/
https://www.ncbi.nlm.nih.gov/pubmed/28392816
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