In vivo regeneration of rat sciatic nerve in a double-halved stitch-less guide: a pilot-study

Area of Science:

• Biomaterials Science
• Neuroscience
• Regenerative Medicine

Background:

• Tubular nerve guides have been used for 20 years as an alternative to autografts for nerve gaps up to 20 mm.
• Limitations of current guides include difficult surgical implantation, fibroblastic reactions to sutures, and poor vascularization in longer/wider guides.

Purpose of the Study:

• To evaluate a new double-halved, rigid, non-degradable nerve guide (NeuroBox) that uses acrylate glue instead of sutures.
• To assess the efficacy of the NeuroBox in promoting nerve regeneration and vascularization in a rat sciatic nerve defect model.

Main Methods:

• The NeuroBox guide was implanted in a 4-mm sciatic nerve defect in five Wistar rats.
• Two guides featured microtrenched surfaces for enhanced regeneration.
• Control groups included rats with untreated gaps and intact contralateral nerves.

Main Results:

• Nerve regeneration was observed in all rats treated with the NeuroBox after 2 months, with good vascularization.
• No regeneration occurred in untreated control animals.
• The surgical technique was simplified by the guide's design and the use of acrylate glue, with no adverse fibroblastic proliferation.

Conclusions:

• The NeuroBox represents a promising, easily implantable nerve guide for peripheral nerve repair.
• The device facilitates nerve regeneration and intraneural vascularization, overcoming limitations of traditional tubular guides.