A new animal model for training rhinoplasty Novo modelo animal para treinamento de rinoplastia

Background: Rhinoplasty poses a unique set of challenges to the plastic surgeon. Surgical dexterity is associated with a long learning curve; this sometimes causes undesirable results, especially in the case of surgeons who are beginners at performing such a complex procedure. Understanding the anatomic basis and mechanical properties of its components is fundamental for achieving satisfactory results in rhinoplasty. To enhance surgical training for those learning the principles of rhinoplasty, a wide variety of models has been described. Among these are the nose of the pig and rabbit, chicken sternal cartilage, nasal silicone models, and even a virtual computer-generated 3-dimensional model of the human nose. Objective: The authors propose the use of a sheep head as a model to replicate the technical steps involved in rhinoseptoplasty for surgical education and research. Methods: Several fresh domestic sheep heads were obtained from a local butcher shop, dissected according to a predetermined set of steps, and modeled in different shapes as described in the literature for human models. Sutures were placed in the cartilage to simulate the steps of a structured rhinoplasty. Results: The caprine model presents anatomical structures similar to those found in humans, including the medial and lateral crura, with appropriate cephalic orientation and domal angles. Septal cartilage was sufficient to simulate several grafts, and bones were available for fracture and rasping. Conclusions: With an estimated more than 1 billion domestic sheep worldwide, this model has the potential to improve outcomes in rhinoplasty by providing wider opportunities for training in a procedure that requires knowledge, precision, and artistry.