Targeting Biofilm Formation on Neurosurgical Implants: Microbial Mechanisms and Therapeutic Strategies

Abstract Neurosurgical implants, including cranioplasty plates, ventricular shunts, and neuromodulation devices, are highly susceptible to biofilm-related infections, with infection rates ranging from 5% to 15%. Biofilms, structured microbial communities encased in extracellular matrices, significantly complicate treatment by providing resistance to both antibiotics and host immune responses. Pathogens such as Staphylococcus epidermidis, Pseudomonas aeruginosa, and Cutibacterium acnes commonly form biofilms on materials like titanium, PEEK, and silicone, used in neurosurgical devices. This review explores biofilm formation mechanisms and evaluates emerging strategies to prevent and treat these infections. Current therapeutic methods, including systemic antibiotics and surgical debridement, often fail to address biofilm resilience, necessitating frequent implant revisions. Novel approaches, such as antimicrobial coatings, nano-textured surfaces, and antibiotic-loaded implants, show promise in reducing bacterial adhesion and biofilm formation. Advanced coatings with silver nanoparticles, chitosan, and copper-based materials have demonstrated significant reductions in bacterial colonization, while nano-texturing enhances tissue integration. Molecularly imprinted polymers (MIPs) offer early detection capabilities for bacterial activity. Future research must focus on optimizing these technologies to ensure long-term efficacy, minimize antibiotic resistance, and improve patient outcomes by reducing implant-related complications.