Application of Zirconia Nanoparticles in dentistry and oral health

Zirconia nanoparticles have emerged as a groundbreaking material in dentistry, offering transformative solutions for restorative, prosthetic, and implant applications due to their exceptional mechanical properties, biocompatibility, and multifunctionality. These nanoparticles enhance dental composites, such as bioactive cements, by improving hardness (e.g., 1.13 GPa Vickers hardness), modulus of elasticity, and antimicrobial efficacy against oral pathogens like Staphylococcus aureus, thereby reducing secondary caries risks. Additive manufacturing techniques, including nanoparticle jetting, enable precise fabrication of zirconia crowns with marginal deviations as low as 21.8 µm, optimizing fit and clinical efficiency. Surface modifications via plasma-sprayed zirconia coatings on titanium implants significantly enhance osseointegration, achieving 54.7% bone-implant contact in vivo, while gradient yttria-stabilized multilayered systems (e.g., KATANA™ HTML) balance aesthetics and strength (flexural strength >800 MPa) for high-stress prosthetic frameworks. Zirconia’s bioactive and inert nature also minimizes biofilm formation and ion release, supporting long-term biocompatibility. Despite these advancements, challenges such as inherent brittleness, technique-sensitive manufacturing, and limited long-term clinical data under dynamic oral conditions necessitate further research. Future innovations should focus on hybrid composites to improve toughness, scalable fabrication protocols, and rigorous clinical validation. By bridging material science and clinical practice, zirconia nanoparticles hold immense potential to advance personalized, durable, and aesthetically driven dental care, aligning with the evolving demands of modern dentistry.