A Study on Imbibition and Syneresis in Four Commercially Available Irreversible Hydrocolloid (Alginate) Impression Materials

Abstract

Purpose To evaluate imbibition and syneresis in four commercially available irreversible hydrocolloid (alginate) impression materials at different time intervals (10, 20 and 30 minutes). Materials and methods Eighty samples of four commercially available irreversible hydrocolloid (alginate) impression materials Algitex (DPI, Mumbai), Plastalgin (Septodont, Cedex, France), Zelgan 2002 (Dentsply), Finndent (Pyrex Polykem) were made. Twenty samples each of four irreversible hydrocolloid (alginate) impression materials were grouped into four groups (I, II, III and IV). Measured quantity of alginate powder and liquid was used to make samples. The samples were evaluated for imbibition and syneresis at different time intervals (i.e.10, 20, and 30 minutes) by weighing on electronic analytic balance. The data were analyzed using the one-way ANOVA, post hoc test and t-test. Results The statistical data revealed that imbibition within four groups of irreversible hydrocolloid (alginate) impression materials were not significant. Regarding syneresis there was insignificant difference between the four groups but within the group itself they showed significant difference between them depending upon the time interval. It was observed that Group I showed significant difference in syneresis at time interval of 10 to 20 minutes. Group II showed significant difference in syneresis at time interval of 10 to 30 minutes. Conclusion This study demonstrated that four groups of irreversible hydrocolloid (alginate) impression materials showed different rates of imbibition and syneresis at time interval of 10, 20 and 30 minutes depending upon molecular weight, calcium concentration and environmental conditions. How to cite this article Garg S, Mittal S, Bansal S, Kansal G. A Study on Imbibition and Syneresis in Four Commercially Available Irreversible Hydrocolloid (Alginate) Impression Materials. Int J Prosthodont Restor Dent 2012;2(1):1-4.

Three-dimensional evaluation of extended-pour alginate impressions depending on storage conditions

“…[8][9][10] Na przestrzeni wielu lat dokonywano modyfikacji składu mas alginatowych dodając do nich nowe substancje mające wyeliminować of the effects obtained from a development in the alginate powder composition is the recent appearance on the dental market of alternative materials with the so-called -"high dimensional stability" (extended-pour alginates). 2,13,14 The aim of the study…”

“…Z badań własnych przeprowadzonych w obecnej pracy wynika, iż ma to miejsce niezależnie od tego czy do środowiska przechowywania wycisku alginatowego zostanie dostarczone zewnętrzne źródło zwiększające wilgotność -minimalna średnia wartość odchylenia od skanu referencyjnego w 144 godzinie badania wystąpiła w grupie z mokrym ręcznikiem umieszczonym w torebce strunowej bez kontaktu z wyciskiem, jednak różnica pomiędzy tą grupą, a grupą w której wycisk był umieszczany w torebce strunowej bez żadnych dodatkowych źródeł zwiększających potencjalnie wilgotność była nieistotna statystycznie. [13][14][15] Guiraldo i wsp. zbadali występowanie różnic w nieorganicznym składzie cząstek wypełniacza.…”