Armored Superhydrophobic Dental Devices Regulate Oral Microecology via Long‐Term Antifouling

Abstract In clinical practice, the widespread use of various dental devices, while essential, often leads to significant microbial colonization, disrupting oral microecology and increasing the risk of oral infections and systemic health issues. Although superhydrophobic surfaces with antifouling properties are proposed as a potential solution, their long‐term efficacy remains a significant challenge. Hierarchical armored structures are created to balance water repellency and durability, with microstructures acting as abrasion resistance and nanostructure reservoirs for water repellency. The robust armored superhydrophobic modification significantly enhances stability and durability, increasing resistance from 5 h of saliva exposure or 10 brushing cycles to an impressive 3 days or 100 cycles, respectively. This breakthrough ensures long‐term antifouling, with the treated surface remaining biofilm‐free for 6 days, compared with just 6 h for an unmodified surface. Both improvements signify a tenfold enhancement. In vivo studies further demonstrate that these modified dental devices successfully restore normal oral microecology. Collectively, this research fundamentally addresses the critical issue of oral microecological imbalance caused by dental devices by establishing long‐term antifouling properties. By introducing the concept of robust superhydrophobic surfaces into homeostatic medicine, this study offers novel perspectives and strategies for the prevention of infectious diseases.