Onderková, Anna; M. Kalaskar, Deepak; (2023) 3D bioprinting for auricular reconstruction: A review and future perspectives. International Journal of Bioprinting , 9 (6) , Article 0898. 10.36922/ijb.0898.

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Abstract

Congenital abnormalities or acquired trauma to the auricle can result in a need for ear reconstruction and negatively impact a person’s quality of life. Autografting, alloplastic implants, and prostheses are available to treat these issues, but each requires multiple surgical stages and has limitations and complications. Three-dimensional (3D) bioprinting promises to allow the creation of living, patient-specific ear substitutes that could reduce operative morbidity. In this review, we evaluate the current state of 3D bioprinting methods through a systematic search and review of 27 studies, aiming to examine this emerging technology within the context of existing reconstructive options. The included studies were all non-randomized experimental studies, except for a single pilot clinical trial. Most of these studies involved both in vitro and in vivo experiments demonstrating the potential of 3D bioprinting to create functional and anatomically accurate engineered cartilaginous frameworks for surgical implantation. Various ways of optimizing printing were identified, from choosing the most suitable material and cell type for the construct to addressing scaffold deformation and shrinkage issues. 3D printing has the potential to revolutionize reconstructive ear surgery by creating functional and aesthetically pleasing auricles. While more research into printing parameters, bioinks, cell types, and materials could optimize results, the next step is to conduct long-term in vivo clinical trials in humans.

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