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Comparing the Effect of Storage Temperature on Dimensional Changes of additional silicone Impression Materials: Harmony medium (an in vitro study)
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Shirin Memaran    , Ghazal Ghorbani * , Narges Ghasemi |
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Abstract: (25 Views) |
Background and aim: Improper dimensional changes in impression materials, including of additional silicone impression materials can cause the failure of prosthetic treatments. The aim of this study was to investigate the effect of different temperatures on the dimensional stability of polyvinyl siloxane impression material.
Materials and methods: In this in vitro study, 99 Harmony medium (Elsodent-France) additional silicone impression were prepared according to the manufacturer's instructions. The impressions were kept in the environment with temperatures of 4, 25 and 40 C°. Then with time intervals: one hour, one day and one week after molding, plastering was done. The diameter, width and height of plaster casts were measured by S.D.M digital caliper. Dimensional changes were analyzed by Two Way ANOVA and POST HOC test
Results: Changes in the diameter dimension; at the temperature of 25 °C at all times compared to each other and at 40 °C during 1 week compared to 1 hour and 1 day, there were significant differences. Changes in the width dimension; at 4°C, 1 hour compared to 1 day, at 25°C, 1 week compared to 1 hour and 1 day, and at 40°C, 1 hour compared to 1 week had a significant difference. Changes in the height dimension; at 25 °C and 40 °C, there were significant differences between 1 week compared to 1 hour and 1 day (p < 0.05). Changes at 25 °C in 1 hour, 4 °C in 1 day and 4 °C in 1 week were within the clinical standard range (1.5%).
Conclusion: In the scope of the present study, it seems that the dimensional stability of the investigated additional silicone is influenced by the temperature of the storage environment and the impression time, and the best time and temperature is 1 hour and 25 °C.
Keywords: Additional Silicone, Temperature, Time, Dimensional Stability
Background and aim: Improper dimensional changes in impression materials, including of additional silicone impression materials can cause the failure of prosthetic treatments. The aim of this study was to investigate the effect of different temperatures on the dimensional stability of polyvinyl siloxane impression material.
Materials and methods: In this in vitro study, 99 Harmony medium (Elsodent-France) additional silicone impression were prepared according to the manufacturer's instructions. The impressions were kept in the environment with temperatures of 4, 25 and 40 C°. Then with time intervals: one hour, one day and one week after molding, plastering was done. The diameter, width and height of plaster casts were measured by S.D.M digital caliper. Dimensional changes were analyzed by Two Way ANOVA and POST HOC test
Results: Changes in the diameter dimension; at the temperature of 25 °C at all times compared to each other and at 40 °C during 1 week compared to 1 hour and 1 day, there were significant differences. Changes in the width dimension; at 4°C, 1 hour compared to 1 day, at 25°C, 1 week compared to 1 hour and 1 day, and at 40°C, 1 hour compared to 1 week had a significant difference. Changes in the height dimension; at 25 °C and 40 °C, there were significant differences between 1 week compared to 1 hour and 1 day (p < 0.05). Changes at 25 °C in 1 hour, 4 °C in 1 day and 4 °C in 1 week were within the clinical standard range (1.5%).
Conclusion: In the scope of the present study, it seems that the dimensional stability of the investigated additional silicone is influenced by the temperature of the storage environment and the impression time, and the best time and temperature is 1 hour and 25 °C.
Keywords: Additional Silicone, Temperature, Time, Dimensional Stability
Background and aim: Improper dimensional changes in impression materials, including of additional silicone impression materials can cause the failure of prosthetic treatments. The aim of this study was to investigate the effect of different temperatures on the dimensional stability of polyvinyl siloxane impression material.
Materials and methods: In this in vitro study, 99 Harmony medium (Elsodent-France) additional silicone impression were prepared according to the manufacturer's instructions. The impressions were kept in the environment with temperatures of 4, 25 and 40 C°. Then with time intervals: one hour, one day and one week after molding, plastering was done. The diameter, width and height of plaster casts were measured by S.D.M digital caliper. Dimensional changes were analyzed by Two Way ANOVA and POST HOC test
Results: Changes in the diameter dimension; at the temperature of 25 °C at all times compared to each other and at 40 °C during 1 week compared to 1 hour and 1 day, there were significant differences. Changes in the width dimension; at 4°C, 1 hour compared to 1 day, at 25°C, 1 week compared to 1 hour and 1 day, and at 40°C, 1 hour compared to 1 week had a significant difference. Changes in the height dimension; at 25 °C and 40 °C, there were significant differences between 1 week compared to 1 hour and 1 day (p < 0.05). Changes at 25 °C in 1 hour, 4 °C in 1 day and 4 °C in 1 week were within the clinical standard range (1.5%).
Conclusion: In the scope of the present study, it seems that the dimensional stability of the investigated additional silicone is influenced by the temperature of the storage environment and the impression time, and the best time and temperature is 1 hour and 25 °C.
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| Keywords: Additional Silicone, Temperature, Time, Dimensional Stability |
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Type of Study: original article |
Subject:
Prothesis
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memaran S, ghorbani G, ghasemi N. Comparing the Effect of Storage Temperature on Dimensional Changes of additional silicone Impression Materials: Harmony medium (an in vitro study). J Res Dent Sci 2025; 22 (2) :107-115 URL: http://jrds.ir/article-1-1432-en.html
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