Abstract Issue

Volume 14 Issue 3 (March) 2025

Original Articles

A comparative evaluation of the initial hydrophilicity of different elastomeric impression materials in the unset and set stages at two different drop ages:an in vitro study
Dr. Meghna Chauhan, Dr. Indresh Rajawat, Dr. Anamika Ahlawat, Dr. Sangeeta J Nair, Dr. Surbhi Mittal

Purpose: To compare the initial hydrophilicity of six various commonly used and commercially available unset and set elastomeric impression materials. Material and Methods:10 samples each for both unset and set stages were made for six elastomeric impression materials IMPREGUM (IM), AQUASIL (AQ), AFFINIS (AF), EXAMIX (EX), PHOTOSIL (PS) and SPEEDEX (SX) using molds of specific dimensions. Contact angles were measured 30 seconds (unsetmaterial) and 60 minutes (set material) after mixing using the contact angle goniometer with 8-μL water drops. The shapes of the drops were video-recorded at drop ages of 1 second and 3 seconds. The initial hydrophilicity was quantified by the calculation of the respective left and right contact angles of each drop shape of 1 second and 3 second sold drops using the analytical software. Results: IMPREGUM was found to have the maximum hydrophilicity in the unset stage and AQUASILin the set stage. Within each group, significant differences in the contact angles were observed in the unset and set stage at 1 second and 3 seconds (p = 0.000)for all elastomeric materials except for Impregum in the unset stage(p = 0.000). Conclusions: Hydrophilicity during setting is not correlated with hydrophilicity after setting for all materials. Polyether impression material was more hydrophilic in the unset stage than in the set stage. AQUASIL has a considerable amount of hydrophilicity in the set stage among all the elastomers tested.

 
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