Electrically charged GTAM membranes stimulate osteogenesis in rabbit calvarial defects

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Skeletal Biology

Background:

• Membrane-protected defects are crucial for studying bone regeneration.
• Titanium-reinforced guided tissue regeneration membranes (GTAM) are used in bone defect repair.
• The role of membrane surface charge in bone neogenesis requires further investigation.

Purpose of the Study:

• To investigate the effect of charged titanium-reinforced GTAM membranes on bone neogenesis.
• To compare the efficacy of neutral, negatively, and positively charged membranes in a rabbit calvaria defect model.

Main Methods:

• Creation of standardized calvarial defects in 36 rabbits.
• Application of neutral, negatively, and positively charged titanium-reinforced GTAM membranes.
• Histomorphometric analysis of bone neogenesis at various time points (5 days to 20 weeks).

Main Results:

• Negatively charged membranes demonstrated significantly accelerated and increased bone neogenesis compared to neutral and positively charged membranes.
• At 10 days, negatively charged sites showed 27.95% newly-formed bone, with negligible formation in neutral and positively charged sites.
• Over time, negatively charged membranes consistently supported greater new bone formation.

Conclusions:

• Negative electrical stimulation via charged GTAM membranes accelerates and sustains bone neogenesis.
• Negatively charged GTAM membranes show promising potential for clinical applications in bone regeneration.