Improving dental epithelial junction on dental implants with bioengineered peptides.

Area of Science:

• Biomaterials Science
• Cell Biology
• Dental Implantology

Background:

• Titanium (Ti) and titanium alloys (Ti6Al4V) are widely used in dental implants.
• Host/biomaterial interactions at the implant surface are crucial for successful osseointegration and soft tissue attachment.
• Current strategies for surface functionalization aim to improve cell adhesion and integration.

Purpose of the Study:

• To engineer novel multifunctional peptides for titanium implant surfaces.
• To enhance keratinocyte (epithelial cell) adhesion to Ti and Ti6Al4V.
• To investigate the efficacy of engineered peptides in preventing epithelial cell migration on dental implants.

Main Methods:

• Selection of metal-binding peptides (MBP-1, MBP-2) using phage display.
• Combination of MBPs with epithelial cell-specific peptides (laminin-5 or E-cadherin specific) to create four metal-cell specific peptides (MCSPs).
• Evaluation of MCSP performance using single-cell force spectroscopy, cell adhesion assays, and in vivo dental implant tests in rats.

Main Results:

• Four MCSPs were successfully engineered by combining metal-binding and cell-specific peptides.
• In vitro and in vivo experiments identified a lead biofunctional peptide with superior performance.
• The selected peptide demonstrated stable epithelial cell adhesion on the trans-gingival portion of dental implants.
• The peptide effectively inhibited apical migration of epithelial cells, crucial for maintaining the epithelial seal.

Conclusions:

• Bioengineered multifunctional peptides significantly enhance epithelial cell adhesion to titanium-based dental implants.
• These peptides offer a promising strategy for improving dental implant integration and long-term stability.
• The findings open new avenues for clinical applications in regenerative dentistry and implantology.