3D models of nonunion fractures in long bones as education tools.

The appearance of fracture complications can present itself as a difficult scenario in a veterinarian's practice, and it can be difficult to diagnose and have a poor prognosis. The recognition of the different types of nonunion fractures can enable quick guidance on the best way to act, thus reducing the cost of treatment and the patient's suffering. The objective of this study was to create 3D models of nonunion fractures in long bones (3D NUFs). The study was carried out in three stages: 1) creating biscuit models from representations of nonunion fractures; 2) scanning the biscuit models of nonunion fractures and 3D modeling; and 3) printing and finishing the 3D models of nonunion fractures (hereafter, 3D NUFs). The creation of biscuit prototypes and the respective digitalization were decisive in producing 3D NUFs, which reproduced the main characteristics of each type of nonunion fracture classification described in the literature. It took 31.1 hours to create and print all 3D NUFs using 95.66 grams of filament (ABS) for a total cost of $3.73. The creation of 3D NUFs from the biscuit dough presented a new way of obtaining didactic models for the teaching of veterinary medicine. The 3D NUFs represent the different forms of low-cost manifestations that characterize this disease, which can be used as a possible teaching-learning tool for veterinary education.

O surgimento de complicações de fraturas pode se apresentar como um cenário difícil na prática do médico veterinário e pode ser difícil de diagnosticar e ter um prognóstico ruim. O reconhecimento dos diferentes tipos de não união de fraturas pode permitir orientação rápida sobre a melhor maneira de agir, reduzindo o custo do tratamento e o sofrimento do paciente. O objetivo deste estudo foi criar modelos 3D de não união de fraturas em ossos longos (3D NUF). O estudo foi em três etapas: 1. Criação dos modelos de biscuit a partir de representações de não união de fraturas; 2. Digitalização dos modelos de biscuit de fraturas sem união e modelagem 3D; 3. Impressão e acabamento de modelos 3D de fraturas sem união (3D NUF). A confecção de protótipos em biscuit e a respectiva digitalização foram decisivas para a produção de NUF 3D. O NUF 3D reproduziu as principais características de cada tipo de classificação de não união de fratura descrita na literatura. Foram necessárias 31,1 horas para criar e imprimir todo o 3D NUF, usando 95,66 gramas de filamento (ABS) a um custo total de US $ 3,73. A criação do 3D NUF a partir da massa de biscuit apresentou uma nova maneira de obter modelos didáticos para o Ensino de Medicina Veterinária. O NUF 3D representou as diferentes formas de manifestação que caracterizam esta doença a baixo custo, que podem ser utilizadas no ensino de assuntos como anatomia e cirurgia.

3D anatomical model for teaching canine lumbosacral epidural anesthesia.

Purpose To develop a 3D anatomical model for teaching canine epidural anesthesia (3DMEA) and to assess its efficacy for teaching and learning prior to the use of live animals. Methods The creation of 3DMEA was based on 3D optical scanning and 3D printing of canine bone pieces of the fifth to the seventh lumbar vertebrae, sacrum and pelvis. A total of 20 male dogs were scheduled for castration. 20 veterinary students watched a video showing epidural anesthesia in dogs before the clinical attempt and were assigned to control or 3DMEA groups. Students in the 3DMEA group trained in the model after the video. For the clinical trial, the epidural procedure was performed by students under the veterinary supervision. When observed the absence of response to nociceptive stimuli, the epidural was considered successful. Then, all students answered a questionnaire evaluating the main difficulty founded in the technique and its degree of difficulty. Results The 3DMEA group reported a lower degree of difficulty to perform the epidural anesthesia technique when compared with the control group (p=0.0037). The 3DMEA reproduced the anatomical structures, allowing the perception of the distance of needle in relation to the iliac prominences during epidural anesthesia. Its mobility allowed simulation of the animal in standing position and sternal recumbency. Conclusion The use of 3DMEA demonstrated greater efficacy in the execution of the technique, being effective in the teaching and learning process before the epidural anesthesia in live animals.

3D anatomical model for teaching canine lumbosacral epidural anesthesia

Abstract Purpose To develop a 3D anatomical model for teaching canine epidural anesthesia (3DMEA) and to assess its efficacy for teaching and learning prior to the use of live animals. Methods The creation of 3DMEA was based on 3D optical scanning and 3D printing of canine bone pieces of the fifth to the seventh lumbar vertebrae, sacrum and pelvis. A total of 20 male dogs were scheduled for castration. 20 veterinary students watched a video showing epidural anesthesia in dogs before the clinical attempt and were assigned to control or 3DMEA groups. Students in the 3DMEA group trained in the model after the video. For the clinical trial, the epidural procedure was performed by students under the veterinary supervision. When observed the absence of response to nociceptive stimuli, the epidural was considered successful. Then, all students answered a questionnaire evaluating the main difficulty founded in the technique and its degree of difficulty. Results The 3DMEA group reported a lower degree of difficulty to perform the epidural anesthesia technique when compared with the control group (p=0.0037). The 3DMEA reproduced the anatomical structures, allowing the perception of the distance of needle in relation to the iliac prominences during epidural anesthesia. Its mobility allowed simulation of the animal in standing position and sternal recumbency. Conclusion The use of 3DMEA demonstrated greater efficacy in the execution of the technique, being effective in the teaching and learning process before the epidural anesthesia in live animals.