Effect of Strontium Titanate Addition on Antifungal, Physical and Mechanical Properties of Soft-Liners

Objective: Soft denture liners are essential in prosthodontics due to their ability to cushion masticatory forces and provide comfort to patients with compromised oral tissues. Despite their clinical benefits, conventional soft liners suffer from significant limitations, including poor bond strength with the denture base, surface degradation, microbial colonization, and limited mechanical resilience. The goal was to assess improvements in shear bond strength and other related surface properties such as surface hardness, and a reduction in C. albicans adherence. Material and Methods: Strontium Titanate (SrTiO₃) nanoparticles were obtained from, and a self-cured soft denture liner was sourced from. All procedures were performed under conditions simulating intraoral temperature, following the manufacturer’s instructions. A dry-heat oven was used for sample conditioning. A total of 45 specimens were fabricated and equally allocated into three experimental groups containing 0%, 1%, and 1.5% concentrations of strontium titanate (SrTiO₃), respectively. Results: The results indicated that SrTiO₃ can play a valuable role in the development of advanced soft lining materials with enhanced durability, biocompatibility, and clinical effectiveness. Conclusion: The incorporation of Strontium Titanate (SrTiO₃) nanoparticles at concentrations of 1% and 1.5% significantly improves the mechanical properties, surface roughness, and reduction in antifungal behavior of acrylic-based soft denture liners.