Triple-layered multi-functional membrane for synergistic enhancement of guided bone regeneration

Advancements in guided bone regeneration (GBR) rely on the development of membranes that can effectively control drug delivery and facilitate bone repair. This study introduces a triple-layered multi-functional membrane (MFM), with each layer serving a specific release profile and function. These layers consist of Qk peptide, strontium (Sr), and vancomycin (Van) for angiogenesis, bone growth, and infection control. The MFM was meticulously designed to ensure sustained drug release kinetics and improved bone regeneration. The membrane morphology was analyzed via SEM, and its mechanical properties were measured via stress-strain curves. In vitro studies confirmed the controlled release of the agents for 21 days. These findings indicate significant enhancements needed for GBR, as supported by in vitro results. The synergy of the membrane's components contributes to a greater therapeutic impact. Furthermore, in vivo results further supported the exceptional performance of MFM in GBR. Within 5 days of implantation, notable improvements in revascularization were observed. After 1 month, micro-CT scans displayed accelerated bone regeneration, while the membrane effectively prevented bacterial growth within 3 days. The MFM/Van-Sr-Qk membrane shows excellent potential for advancing bone regeneration and GBR therapies, warranting further research and development in this promising field.