Vascularization Strategies for Porous Polyethylene Implants.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Craniofacial Surgery

Background:

• Porous polyethylene (pPE) is widely used in craniofacial reconstructive surgery.
• Rapid vascularization and tissue incorporation are crucial for pPE to prevent complications like infection, migration, and extrusion.
• Over 20 years, various strategies have been developed to enhance pPE integration.

Purpose of the Study:

• To review and evaluate sophisticated strategies aimed at improving vascularization and tissue incorporation of porous polyethylene (pPE) implants.
• To assess methods that promote host tissue response and reduce pPE-related complications in craniofacial reconstruction.

Main Methods:

• Review of strategies including angiogenic stimulation (growth factors), material modifications (surface roughness, bioactive glass), surface coatings (peptides, glycoproteins, blood products), and cell seeding (fibroblasts, stem cells, microvascular fragments).
• Evaluation of experimental study results for each strategy.

Main Results:

• Angiogenic stimulation using growth factors (EGF, bFGF) and other agents showed promise.
• Material modifications like increased surface roughness and bioactive glass incorporation improved integration.
• Surface coatings with various bioactive molecules and autologous materials demonstrated positive effects.
• Seeding with different cell types and microvascular fragments facilitated tissue incorporation.

Conclusions:

• Multiple strategies, including growth factor delivery, material surface enhancement, bioactive coatings, and cell seeding, show potential for improving porous polyethylene performance.
• These approaches have demonstrated promising results in experimental studies and may enhance clinical success rates for pPE in craniofacial surgery.