Dual Extrusion Patterning Drives Tissue Development Aesthetics and Shape Retention in 3D Printed Nipple-Areola...

Area of Science:

• Biomaterials Engineering
• Regenerative Medicine
• Plastic Surgery

Background:

• Mastectomy for breast cancer causes significant physical and emotional distress.
• Nipple-areola reconstruction is crucial for psychological recovery but current methods are inadequate.
• Existing techniques often result in flattened, disfigured reconstructions within a year.

Purpose of the Study:

• To develop a long-term solution for nipple reconstruction using 3D printed hybrid scaffolds.
• To create a viable nipple-areola complex that maintains its shape and natural appearance.
• To improve the quality of life for breast cancer survivors undergoing reconstruction.

Main Methods:

• Fabrication of 3D hybrid scaffolds using gelatin methacrylate and poly(ethylene) glycol hydrogels.
• In vitro testing to assess structural integrity and shape retention.
• In vivo subcutaneous implantation in animal models to evaluate biocompatibility and tissue response.

Main Results:

• The 3D printed scaffolds demonstrated robust structural capacity and long-term shape retention.
• In vitro tests showed resistance to fibroblastic contraction.
• In vivo studies revealed minimal fibrotic encapsulation, significant neovascularization, and healthy granulation tissue formation.

Conclusions:

• 3D printed hybrid scaffolds offer a promising regenerative approach for nipple-areola reconstruction.
• These bioprinted grafts have the potential to revolutionize breast reconstruction by providing durable, natural-looking results.
• The technology could reduce the need for revision surgeries and enhance patient satisfaction.