Modern Applications of 3D Printing: The Case of an Artificial Ear Splint Model

• Main Authors: Athanasios Argyropoulos, Pantelis N. Botsaris
• Format: Article
• Language: English
• Published: MDPI AG 2021-08-01
• Series: Methods and Protocols
• Subjects: stick-out protruding ears; ear aligners; PCL100; Z-Flex; 3D printing
• Online Access: https://www.mdpi.com/2409-9279/4/3/54

Three-dimensional (3D) printing is a leading manufacturing technique in the medical field. The constantly improving quality of 3D printers has revolutionized the approach to new challenges in medicine for a wide range of applications including otoplasty, medical devices, and tissue engineering. The aim of this study is to provide a comprehensive overview of an artificial ear splint model applied to the human auricle for the treatment of stick-out protruding ears. The deformity of stick-out protruding ears remains a significant challenge, where the complex and distinctive shape preservation are key factors. To address this challenge, we have developed a protocol that involves photogrammetry techniques, reverse engineering technologies, a smart prototype design, and 3D printing processes. Specifically, we fabricated a 3D printed ear splint model via fused deposition modelling (FDM) technology by testing two materials, a thermoplastic polyester elastomer material (Z-Flex) and polycaprolactone (PCL 100). Our strategy affords a custom-made and patient-specific artificial ear aligner with mechanical properties that ensures sufficient preservation of the auricular shape by applying a force on the helix and antihelix and enables the ears to pin back to the head.