Biodegradable mesh implants for prolapse repair: Advances in computational modelling and experimental validation.

Area of Science:

• Biomedical Engineering
• Materials Science
• Gynecology

Background:

• Pelvic organ prolapse (POP) significantly impacts women's quality of life, with limited effective treatments for severe cases.
• Synthetic meshes, previously used for POP repair, carry risks and have faced regulatory restrictions (FDA ban on transvaginal prolapse meshes).
• Biodegradable meshes present a promising alternative due to their biocompatibility and tunable mechanical properties.

Purpose of the Study:

• To develop and evaluate biodegradable meshes with tailored properties for pelvic organ prolapse (POP) repair.
• To computationally model and experimentally validate mesh designs that mimic native vaginal tissue biomechanics.
• To compare the performance of novel biodegradable meshes against native vaginal tissue and commercially available options.

Main Methods:

• Computational modeling of biodegradable meshes with variations in pore geometry, size, filament thickness, and regional filament placement.
• 3D printing of a selected mesh design for experimental validation.
• Uniaxial tensile testing of sow vaginal tissue and developed meshes to assess mechanical behavior.
• Comparison of mesh mechanical properties with native vaginal tissue and uterosacral ligament.

Main Results:

• A biodegradable mesh design with a 1.50 mm pore diameter, specific filament placement, and variable filament thickness closely replicated sow vaginal tissue mechanical behavior.
• The developed biodegradable meshes did not exhibit mechanical properties similar to the uterosacral ligament.
• A commercially available mesh failed to mimic the mechanical behavior of both vaginal tissue and the uterosacral ligament.

Conclusions:

• Optimized biodegradable meshes hold significant potential for developing safer and more effective treatments for pelvic organ prolapse (POP).
• Customizable biodegradable mesh properties offer a pathway towards personalized surgical solutions for POP.
• Further research is needed to match the mechanical properties of critical anatomical structures like the uterosacral ligament for comprehensive POP repair.