Dental Journal (Majalah Kedokteran Gigi)
ISSN 1978-3728
Vol. 46 / No. 1 / Published : 2013-03
Order : 2, and page :5 - 8
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Original Article :
Changes in setting time of alginate impression material with different water temperature
Author :
- N iti Matram *1
- Decky J. Indrani*2
- Department of Dental Material, Faculty of Dentistry, Universitas Indonesia, Jakarta – Indonesia
- Department of Dental Material, Faculty of Dentistry, Universitas Indonesia, Jakarta – Indonesia
Abstract :
Background: Previous studies showed that setting process of alginates can be influenced by temperature. Purpose: To know the changes in setting time due to differences in water temperature and to determine the correlation between water temperature and the setting time. Methods: Seven groups of dough alginate were prepared by mixing alginate powder and water, each using a temperature between 13–280° C with a difference of 2.50° C. A sample mold ( = 30 mm, t = 16 mm) was placed on a flat plate and filled with doug alginate. Immediately the flat end of a polished acrylic rod was placed in contact with the surface of dough alginate. Setting time of alginat was measured from the starting of the mix to the time when the alginate does not adhere to the end of the rod. Setting time alginate data were analyzed using one-way ANOVA, LSD and Pearson. Results: Setting time of alginate with water temperature between 13–28° C were 87 to 119.4 seconds and were significantly different (p<0.01). The setting time between group were also significantly different (p<0.01). There was an inverse correlation between water temperature and the setting time (r = -0.968). Conclusion: Water temperature between 13° C–28° C with a difference of 2.5° C produced significant differences in alginate setting time; the lower the water temperature being used the longer the setting time was produced.
Keyword :
Alginate, water temperature, setting time, polimerization,
References :
Nandini VV,(2008) Alginat impression: A practical perspective - : J Conserv Dent
Archive Article
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Volume : 46 / No. : 1 / Pub. : 2013-03 |
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