AN IN VITRO STUDY TO EVALUATE THE TEAR STRENGTH OF AUTOCLAVABLE PVS, SMART WETTING PVS AND CONDENSATION SILICONE AND COMPARE THEM UPON AUTOCLAVING AND DISINFECTION.

Dr. Garima Gothwal, Dr. Hemant Kumar Sharma, Dr. Kusum Singh, Dr. Richa Sengar

Abstract


Aim

            The tear strength of three different types of elastomeric impression materials was measured after disinfection and sterilization.

Material and Method

            Dumb-bell shaped Tear strength specimens were prepared according to ISO 34-1 standardization. Ninety samples were prepared followed by disinfection and sterilization and tested with trouser piece method on Instron universal testing machine at a speed of 10 mm/min. One‑way ANOVA, followed by Tukey post hoc test was used for statistical analysis.

Results

            No significant difference was found when AFFINIS, SPEEDEX and AQUASIL were compared individually. When materials were compared with each other significant difference was present, highest AQUASIL while SPEEDEX and AFFINIS almost alike.

Conclusion

            It was concluded that tear strength of AQUASIL was the highest. Disinfection and autoclaving had no significant influence on the three materials and showed adequate tear strength.


Keywords


Tear strength, Disinfection, Sterilization, polyvinyl siloxane.

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