Ideal scaffold design for total ear reconstruction using a three-dimensional printing technique.

Current auricular reconstruction methods rely on traditional surgical techniques, which may lack precision and customization. Prior research has shown that 3D printing offers potential for creating patient-specific frameworks. However, no prior work had resolved how to translate imaging data into a surgically viable scaffold. Existing 3D-printed scaffolds have not met clinical requirements for shape accuracy or structural stability. The anatomical complexity of the ear poses a challenge for scaffold design. Skin thickness and pore size are critical for integration with surrounding tissue. No prior studies had addressed the need for a two-stage surgical approach in scaffold design. This gap motivated the development of a scaffold that aligns with clinical protocols and anatomical requirements.

The aim of the study was to design a 3D-printed scaffold suitable for auricular reconstruction surgery. The specific problem addressed is the lack of clinically appropriate 3D scaffolds for ear reconstruction. The motivation stems from the limitations of current methods in achieving anatomical accuracy. The design needed to accommodate skin thickness and allow for cartilage implantation. The study aimed to incorporate surgical requirements into the scaffold's geometry. The two-stage approach of Nagata's surgery guided the scaffold's structural modifications. The goal was to create a scaffold that mimics real cartilage frameworks. The study sought to improve clinical applicability of 3D-printed constructs.

Facial CT images of the unaffected ear were segmented to extract anatomical data. The extracted data were converted into a 3D model using imaging software. The model was mirrored to represent the affected side of the ear. The design was modified to align with Nagata's two-stage surgical protocol. A 3D scaffold was printed using polycaprolactone as the material. The scaffold was scaled to be 4 mm smaller than the real ear to account for skin thickness. Pores measuring 2 mm were incorporated to enable cartilage implantation. The scaffold was evaluated for anatomical resemblance to current surgical frameworks.

The 3D scaffold closely resembled the anatomical structure of real ear cartilage frameworks. The scaffold was designed to be 4 mm smaller than the real ear to accommodate skin thickness. Pores of 2 mm were included to allow for diced cartilage implantation. The scaffold was printed using polycaprolactone, a biocompatible material. The design modifications aligned with Nagata's two-stage surgical approach. The scaffold's geometry was validated against clinical requirements. The scaffold demonstrated potential for integration with surrounding tissue. The study confirmed that 3D printing can overcome limitations of traditional reconstruction methods.

The proposed scaffold design addresses anatomical and surgical requirements for auricular reconstruction. The scaffold's geometry and pore structure were optimized for clinical use. The use of polycaprolactone ensured biocompatibility and structural stability. The design modifications align with Nagata's two-stage surgical protocol. The scaffold's anatomical accuracy was validated against current surgical frameworks. The inclusion of 2 mm pores allows for cartilage implantation and regeneration. The study confirms that 3D printing can overcome limitations of traditional methods. Further research is needed to ensure functional stability and address ethical concerns.