Engineering Auxetic Cylinders and Intestine to Improve Longitudinal Intestinal Lengthening and Tailoring Procedure

Area of Science:

• Biomaterials Science
• Mechanical Engineering
• Regenerative Medicine

Background:

• Auxetic materials exhibit unique deformation properties, offering potential for tissue engineering and medical devices.
• Current methods for tissue coupling and lengthening have limitations.
• Microorganism-driven fabrication presents novel routes for creating advanced materials.

Purpose of the Study:

• To design and characterize a novel auxetic material with potential biomedical applications.
• To investigate the mechanical properties and peristaltic behavior of the developed material.
• To explore the feasibility of using this material for intestinal lengthening procedures.

Main Methods:

• Fabrication of gelling silicone cylinders incorporating microorganism-induced buckled/collapsed bubbles.
• Utilizing finite element modeling to analyze the mechanical behavior and peristalsis of hollow auxetic cylinders.
• Evaluating the auxetic properties derived from the bubble formation.

Main Results:

• Successfully designed a hybrid auxetic material through microorganism metabolic activity.
• Finite element analysis confirmed the tubular structure promotes worm-like peristalsis.
• The material exhibits auxetic properties due to the formation of internal bubbles.

Conclusions:

• The developed hybrid auxetic structures demonstrate promising peristaltic motion.
• Potential applications include longitudinal intestinal lengthening for short bowel syndrome treatment.
• This synergistic approach marks a significant step toward clinical translation of hybrid auxetic materials.