Structure and Mechanical Performance of Biomimetic Costal Cartilage Models for Ear Framework Handcrafting Simulation

SUMMARY: Ear framework handcrafting simulation using costal cartilage models is crucially important for ear reconstruction surgery education. Fabrication of proper models that are mechanically and structurally comparable to their native counterparts is an unmet challenge. The authors developed structure and mechanical performance biomimetic costal cartilage models for practicing and simulating handcrafting of ear frameworks. High-tensile silicone and three-dimensional techniques were used to fabricate biomimetic models. The models well-replicated the three-dimensional structure of human costal cartilage. Comprehensive mechanical tests showed that high-tensile silicone models had stiffness, hardness, and suture retention ability similar to those of their native counterparts, and they were distinctly superior to commonly used materials for costal cartilage simulation. This model satisfied surgeons and contributed to creation of outstanding ear frameworks. The recreated models were used in ear framework handcrafting workshops. Novices' surgical simulation performance with different models was compared and analyzed. People who used high-tensile silicone models have greater progress and confidence after training. Using high-tensile silicone costal cartilage models is an excellent choice for practicing and simulating the fabrication of ear frameworks manually. The models benefit practitioners and students in practicing handcrafting ear frameworks and surgical skills.