Resilience In Compression: Comparative Evaluation Of Elastic Recovery In Two Commercially Available Addition Silicone Impression Materials

This in vitro study evaluates and compares the elastic recovery under compressive strain of two commercially available addition silicone impression materials—Dentsply Aquasil and Ad Sil Acura. Standardized cylindrical specimens (20 mm × 12.5 mm) were prepared per ISO 4823:2007 and subjected to 30% compressive strain using a Universal Testing Machine. Recovery height was measured after 2 minutes, and recovery percentage was calculated. Dentsply Aquasil showed higher elastic recovery (98.5%) than Ad Sil Acura (96.9%), with statistical significance (p < 0.05). Results suggest Dentsply Aquasil provides better dimensional stability for clinical use.