Collagen vicryl--a new dural prosthesis

Area of Science:

• Neurosurgery
• Biomaterials Science
• Regenerative Medicine

Background:

• The absence of an ideal dural grafting material necessitates the evaluation of various substitutes.
• Cadaveric human lyophilized dura, a common choice, faces scrutiny due to potential Creutzfeldt-Jakob disease transmission.
• Degradable materials are being explored as safer alternatives for dural repair.

Purpose of the Study:

• To compare the efficacy of three degradable dural substitutes: collagen vicryl, Zenoderm, and Lyodura.
• To assess the biocompatibility, integration, and host response to these materials in a rabbit model.
• To identify a potentially superior dural graft material.

Main Methods:

• Dural defects in New Zealand White Rabbits were repaired with collagen vicryl, Zenoderm, or Lyodura.
• A control group with unrepaired dura was included for comparison.
• Animals were sacrificed at 2, 4, 8, 12, and 24 weeks for gross and histological examination.

Main Results:

• Collagen vicryl promoted fibroblast ingrowth and neomembrane formation, resembling host dura by 3 months with minimal adhesions.
• Zenoderm and Lyodura remained undegraded, causing more cortical adhesions and showing bone ingrowth with persistent inflammation at 6 months.
• Control group exhibited severe cortical adhesions without neomembrane formation.

Conclusions:

• Collagen vicryl serves as a suitable dural substitute, exhibiting excellent biocompatibility and integration.
• Compared to Zenoderm and Lyodura, collagen vicryl demonstrates fewer adverse effects and better regenerative potential.
• Further laboratory and clinical studies are recommended to fully validate collagen vicryl as a dural grafting material.