Abstract
Orthodontic therapy utilizing fixed equipment frequently results in heightened plaque accumulation, which can cause enamel demineralization and periodontal issues. Recent breakthroughs in surface coating technology have brought various antimicrobial techniques designed to diminish bacterial adherence and biofilm formation on orthodontic components. This study thoroughly examines many types of antibacterial coatings, including metallic nanoparticles (such as silver, zinc, and titanium), polymeric layers, carbon-based materials, and bioactive chemicals, emphasizing their modes of action, microbial targets, and therapeutic significance. Silver-based coatings are among the most thoroughly researched due to their continuous ion release and broad-spectrum antibacterial effectiveness. Photocatalytic titanium dioxide and synergistic composite coatings demonstrate promising outcomes under particular activation conditions. The review examines biocompatibility concerns, long-term durability, and the limitations of existing methodologies, while suggesting future research avenues to connect laboratory innovations with clinical applications. The surface modification of orthodontic equipment offers a practical approach to reducing oral health hazards associated with therapy and improving patient outcomes.