This study aims to develop three-dimensional printing models of the bony nasal cavity and paranasal sinuses of big and domestic cats using reconstructed computed tomographic images. This work included an exhaustive study of the osseous nasal anatomy of the domestic cat carried out through dissections, bone trepanations and sectional anatomy. With the use of OsiriX viewer, the DICOM images were postprocessed to obtaining maximum-intensity projection and volume-rendering reconstructions, which allowed for the visualization of the nasal cavity structures and the paranasal sinuses, providing an improvement in the future anatomical studies and diagnosis of pathologies. DICOM images were also processed with AMIRA software to obtain three-dimensional images using semiautomatic segmentation application. These images were then exported using 3D Slicer software for three-dimensional printing. Molds were printed with the Stratasys 3D printer. In human medicine, three-dimensional printing is already of great importance in the clinical field; however, it has not yet been implemented in veterinary medicine and is a technique that will, in the future, in addition to facilitating the anatomical study and diagnosis of diseases, allow for the development of implants that will improve the treatment of pathologies and the survival of big felids.

The objective of this work was to study the normal anatomy of the nasal cavity of the three species of big cats (leopard, lion, and cheetah) compared to the domestic cat through the use of computed tomography, magnetic resonance imaging, and rhinoscopy. Computed tomography allowed us to clearly visualize the entire bony and cartilaginous framework that supports the nasal cavity. Magnetic resonance imaging permitted better visualization of the soft tissues of this cavity. On the other hand, rhinoscopy enabled the direct visualization of the mucosa of the vestibule and nasal cavity, which is very useful in the diagnosis of masses or foreign bodies. Furthermore, with this technique, it has been possible to observe several small orifices from the nasolacrimal duct, the pharyngeal auditory tube, and the lateral nasal gland. Computed tomography, magnetic resonance imaging, and rhinoscopy are useful tools in analysis of the anatomical characteristics of the nasal cavity in these species.

This work aims to evaluate students’ opinions on the materials normally used in anatomy practical classes (fixed and plastinated) compared to 3D anatomical prints. For this purpose, students of anatomy enrolled in the Degree in Veterinary Medicine from the University of Murcia filled out a satisfaction survey about both kinds of material. The students rated the fixed material with a satisfaction percentage close to 100% and the plastinated material with a percentage higher than 75%. Regarding the 3D prints, the percentage obtained was consistently higher than 50% except for two issues: the identification of the vascular structures of the dolphin’s head and the usefulness for surgery of the viscera and vascular structures of the cat, both of which scored less than 50%. This could be related to the lesser knowledge of dolphins of the veterinary students as well as the complexity of these structures. However, the other questions, such as usefulness for learning and exam preparation, the quality of the anatomical piece, the identification of the feline spleen and kidneys, etc. obtained a satisfaction percentage between 58 and 90.40%. This reflects the good acceptance by students of the 3D prints and may allow for a reduction in the number of cadavers used.