Comparative evaluation of elastic recovery of three different elastomeric impression materials on chemical disinfection and autoclaving: An in vitro study

Abstract

Aim: The aim of the study was to investigate the effect of disinfection and steam autoclaving on the elastic recovery of three different elastomeric impression materials. Settings and Design: In vivo - comparative study. Materials and Methods: Ninety dumbbell-shaped specimens of commercially available two addition-cured silicones (AFFINIS and AQUASIL) and one condensation-cured silicone (SPEEDEX) impression materials were prepared and treated with chemical disinfectant and steam autoclaving. Specimens were seal packed and sent to laboratory for testing elastic recovery. After the specimen had been pulled to failure, the broken parts were fitted back together, and the distance between the marks was measured using an electronic Vernier caliper. Statistical Analysis Used: one-way analysis of variance test and Tukey post hoc test for multiple comparisons. Results: The result showed significant difference in elastic recovery of AFFINIS when it was disinfected and steam autoclaved whereas elastic recovery showed no significant difference when SPEEDEX and AQUASIL were disinfected and steam autoclaved. Similarly, results were alike when AFFINIS, SPEEDEX, and AQUASIL were compared on disinfection. However, significant difference was noted on steam autoclaving, highest being the mean value of AFFINIS. Conclusion: Within the limitations of this in vitro study, conclusion was made that the elastic recovery of AFFINIS was the least which improved with disinfection and autoclaving. Elastic recovery of SPEEDEX and AQUASIL was similar. However, all the three materials used in the study can be safely sterilized after clinical use and before being sent to the laboratory without significantly affecting their elastic recovery.

Evaluation of Antimicrobial Efficacy of UVC Radiation, Gaseous Ozone, and Liquid Chemicals Used for Disinfection of Silicone Dental Impression Materials

“…In particular, polyvinyl siloxanes (PVS, addition silicones) are characterized by high elastic recovery and are resistant to tearing and deformation. They are almost ideal elastic impression materials with 99.9% of elastic recovery (while for condensation silicones, it ranges between 98.2% and 99.6%) [ 22 ]. Demajo et al demonstrated that silicone impression material exhibited a significantly lower microbial count than alginate material [ 23 ].…”

Comparative analysis of dimensional changes in autoclavable polyvinyl siloxane (PVS) impressions under various Sterilization/Disinfection Protocols: A randomized controlled trial

“…The antimicrobial activity of sodium hypochlorite is related to the presence of chlorine, which inhibits essential bacterial enzymes, leading to irreversible enzymatic inactivation in bacteria and lipid and fatty acid degradation ( Estrela et al, 2002 ). However, it should be emphasized that this procedure ensures disinfection rather than complete sterilization ( Gothwal et al, 2019 ).…”

Mechanical and Physical Properties of an Experimental Chemically and Green-Nano Improved Dental Alginate after Proven Antimicrobial Potentials

“…Elastic recovery is the ability of an elastic material to return to its original shape after being deformed inside the mouth with negligible permeant deformation. The higher the elastic recovery of a material, the more precise the final restoration will be [7]. Moreover, tear energy is very important, especially in taking impressions in thin areas.…”