A Promising Potential of Brown Algae Sargassum polycystum as Irreversible Hydrocolloid Impression Material

Abstract

This study aimed to investigate the potential use of brown algae <i>Sargassum polycystum</i> as irreversible hydrocolloid (alginate) impression material. Potassium alginate extracted from <i>Sargassum polycystum</i> was prepared in three different compositions (14%, 15%, and 16%) and mixed with other standard components to form an alginate impression material. Prior to that, the purity of potassium alginate was quantified with Fourier Transform Infrared Spectroscopy (FTIR) analysis. As a control material, the alginate impression material from a commercially available product was used. All alginate impression materials were then applied to a die stone model. Dimensional accuracy was measured by calculating the mesiodistal width of incisors in the generated dental cast using a digital caliper 0.01 accuracy (five replications). In addition, to evaluate the dimensional stability, the impression results were poured at four different periods (immediately, 5 min, 10 min, and 15 min). An independent <i>t</i>-test was performed to compare the measurement results with <i>p</i> < 0.05 considered significant. Analytical results confirm that the impression material containing 15% potassium alginate gives the best dimensional accuracy similar to control (<i>p</i> > 0.05). Meanwhile, the optimal dimensional stability was produced in the impression material containing 16% potassium alginate. Our study suggested that brown algae <i>Sargassum polycystum</i> has a promising potential to be used as an alginate impression material in clinical application.

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