Evaluation of the Surface Characteristics of Irreversible Hydrocolloid Impression Material Incorporated with Silver Nanoparticles at Different Concentrations- An Invitro Study

Abstract

Background: Incorporation of Silver nano-particles in irreversible hydrocolloid impression materials to improve the antimicrobial property, could influence the surface characteristics of the impression material.

Aim:To evaluate the surface roughness and surface detail reproduction of irreversible hydrocolloid impression material incorporated with silver nano-particles at different concentrations.

Materials and Methods: A total of 80 samples were selected and were grouped randomly into four groups of 20 samples each. The Group I (C.G), Group II (T.G 1) Group III (T.G 2) & Group IV (T.G 3) samples were casts poured from irreversible hydrocolloid impression material without AgNp, with 1% of AgNp, 1.5% of AgNp& with 2% concentration of AgNp respectively. The samples were employed for evaluating the surface detail reproduction and Surface Roughness.Chi square test and Kruskal wallis testwere used to analyze the surface texture statistically both within and between the test groups.

Results: The surface detail reproduction was satisfactory with all the four groups. Statistically significant changes was observed in Groups IV test sample and a statistically insignificant surface change was observed in Groups I ,II and III test samples. There was a negligible change in surface roughness in Groups I, II, and III test samples with a slight increase in surface roughness in Group IV samples.

Conclusion: All the test groups produced satisfactory surface detail reproduction on irreversible hydrocolloid impressions. 2% AgNp group alone have resulted in statistically significant changes in surface detail reproduction. All the test samples except 2% AgNp group showed increase in surface roughness values. (AgNp- silver nanoparticles, T.G-Test group, C.G –Control group)