Polycaprolactone/gelatin/ZIF-8 nanofiber membrane for advanced guided tissue regeneration in periodontal therapy.

The periodontal tissue regeneration strategy based on guided tissue regeneration (GTR) membranes is an effective therapy for periodontal defects. Traditional GTR membranes, however, primarily serve as physical barriers and lack antimicrobial and osteogenic functions. Herein, we developed a multifunctional nanofiber membrane with zeolitic imidazolate framework-8 nanoparticles (ZIF-8 NPs) loaded in a hydrophilic gelatin layer. The release of Zn2+ from the ZIF-8 NPs effectively promoted bone tissue repair and simultaneously enabled GTR membranes with >99 % antibacterial efficacies against Escherichia coli and Staphylococcus aureus. Additionally, the incorporation of gelatin enhances cellular adhesion and growth. Furthermore, in vivo studies revealed significant bone regeneration, with increased trabecular number and reduced separation. Owing to its multiple functions, excellent biocompatibility and desirable mechanical properties, this membrane has considerable potential in the field of periodontal therapy.