Nano-Engineered Titanium Implants Loaded With Gingival Fibroblasts-Derived Microvesicles Enhance Early...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Dental Implantology

Background:

• Titanium dental implants require osseointegration and soft tissue seal for success.
• Optimizing soft tissue healing around implants is crucial but underexplored.
• Current strategies often lack focus on simultaneous hard and soft tissue regeneration.

Purpose of the Study:

• To develop and evaluate titania nanopore (TNP) implant surfaces functionalized with human primary gingival fibroblasts-derived microvesicles (hGFs-MVs).
• To investigate the efficacy of hGFs-MVs loaded TNP implants in promoting early peri-implant soft and hard tissue healing in vivo.
• To establish a cell-free strategy for enhancing dental implant integration.

Main Methods:

• hGFs-MVs were isolated, characterized (cryo-electron microscopy), and loaded onto TNP implants (10^9 particles/implant).
• Implants were placed in rat molar extraction sockets, with assessment at 1 and 4 weeks using micro-CT and histology.
• Groups included TNP and hGFs-MVs/TNP implants, with sample sizes of 5-6 animals per group.

Main Results:

• hGFs-MVs displayed a double-membrane structure, with peak release observed at day 3 in vitro.
• Histology showed early osteoid formation (week 1) and mature bone (week 4) around implants.
• hGFs-MVs/TNP implants demonstrated significantly higher bone-to-implant contact (BIC%) and enhanced soft tissue attachment with mature collagen fibers at 4 weeks.

Conclusions:

• Functionalized hGFs-MVs/TNP implants represent a promising 'proof-of-concept' for improved dental implant therapy.
• This cell-free approach effectively enhances both osseointegration and peri-implant soft tissue integration.
• The strategy offers a clinically relevant method for optimizing healing and long-term success of titanium dental implants.