Hydrophobic and Hydrophilic Properties of Dental Materials – A Review.

ABSTRACT

The hydrophobic and hydrophilic characteristics of dental materials are crucial to their clinical efficacy in prosthodontics.  The material's surface energy and how it interacts with oral fluids, which are usually measured by contact angle and wettability, are what mostly influence these qualities.  Hydrophilic materials, including polyether impression materials, hydrocolloids, glass ionomer cements, and hydrophilic resin adhesives, possess low contact angles and high wettability, facilitating precise impressions, efficient bonding to moist dentin, and enhanced adhesion in moisture-laden environments.  On the other hand, hydrophobic materials like polyvinyl siloxane impression materials, polymethyl methacrylate denture bases, and composite resins keep water from getting in because they have low surface energy and high contact angles. This gives them dimensional stability, lower solubility, and better mechanical properties.  Recent developments have led to surfactant modifications, the addition of hydrophilic monomers, and coatings based on nanotechnology to improve the wettability of materials that are naturally hydrophobic, such as silicones and resin systems.  Clinically, it is important to find a balance between hydrophilic and hydrophobic behavior. Hydrophilicity makes it possible for the material to adapt to moist oral circumstances, while hydrophobicity makes it more stable and durable over time.  To make prosthodontic treatments more accurate, longer-lasting, and biocompatible, it is important to understand and improve these surface qualities.

Key words: Hydrophobicity, Hydrophilicity, Contact angle, Wettability, Prosthodontics, Dental materials.