Browsing by Subject "3D printing"

Now showing 1 - 7 of 7
  • Thumbnail Image
    Publication
    Open Access
    Análisis mediante geomática de tres retablos barrocos en el sureste español: la singularidad de un patrimonio religioso de interés turístico
    (Universidad de Murcia. Servicio de publicaciones, 2021) Peña Velasco, Concepción de la; García León, Josefina; Riquelme Gómez, María de los Ángeles
    La documentación gráfica aportada por las nuevas tecnologías posee un enorme potencial para la investigación, docencia y difusión, que, en este caso, se ha aplicado a tres retablos del siglo XVIII, con categoría de BIC. Se ha realizado una modelización con Fotogrametría y Láser escáner. Los resultados, interpretados y debatidos por profesionales diversos, proporcionan información útil para el estudio del bien y permiten afrontar actuaciones de conservación y sensibilización patrimonial y plantear acciones destinadas a personas con discapacidad. Se hace un análisis comparativo y se reflexiona sobre la divulgación óptima como recurso turístico a partir de la documentación y análisis efectuados.
  • Thumbnail Image
    Publication
    Open Access
    Anatomical and three-dimensional study of the female feline abdominal and pelvic vascular system using dissections, computed tomography angiography and magnetic resonance angiography
    (MDPI, 2023-12-14) Rojo Ríos, Daniel; Soler Laguía, Marta; Kilroy, David; Sánchez Collado, Cayetano; García García, María I.; Arencibia Espinosa, Alberto; Ayala Florenciano, María Dolores; Gil Cano, Francisco; Martínez Gomariz, Francisco; Ramírez Zarzosa, Gregorio José; Sánchez Collado, Cayetano; Anatomía y Anatomía Patológica Comparadas; Facultad de Veterinaria
    This study describes the anatomical characteristics of the abdominal and pelvic vascular system of two healthy mature female cats via three-dimensional contrast-enhanced computed tomography angiography, non-contrast enhanced magnetic resonance angiography and three-dimensional printing. Volume-rendering computed tomography angiography images were acquired from the ventral aspect using RadiAnt, Amira and OsiriX MD Dicom three-dimensional formats, and three-dimensional printing was obtained and compared with the corresponding computed tomography angiography images. Non-contrast enhanced magnetic resonance angiography was made us ing the time-of-flight imaging in ventral, oblique and lateral views. In addition, three cadavers with colored latex injection were dissected to facilitate the identification of the vascular structures. Three-dimensional computed tomography angiography showed the main vascular structures, whereas with the time-of-flight blood appeared with a high signal intensity compared with associated abdominal and pelvic tissues. Three-dimensional computed tomography angiography images and time-of-flight sequences provided adequate anatomical details of the main arteries and veins that could be used for future feline anatomical and clinical vascular studies of the abdomen and pelvis
  • Thumbnail Image
    Publication
    Open Access
    Creation of three-dimensional anatomical vascular and biliary models for the study of the feline liver (Felis silvestris catus L.): a comparative CT, volume rendering (Vr), cast and 3D printing study
    (MDPI, 2023-05-09) Rojo Ríos, Daniel; Ramírez Zarzosa, Gregorio José; Soler Laguía, Marta; Kilroy, David; Martínez Gomariz, Francisco; Sánchez Collado, Cayetano; Gil Cano, Francisco; García García, María I.; Raduán Jáber, José; Arencibia Espinosa, Alberto; Anatomía y Anatomía Patológica Comparada; Facultad de Veterinaria
    In this study, six adult feline cadavers were examined using CTA, 3D printing, and casts injected with epoxy. The aorta, the portal vein, and the gallbladder of 3 feline cadavers were separately injected with a 50% mixture of colored vulcanized latex and hydrated barium sulfate as contrast medium to analyze by CT the arterial, venous and biliary systems. The other three cadavers were injected with a mixture of epoxy resin in the aorta, gallbladder and hepatic veins, separately. After the corrosion and washing process, hepatic vascular and biliary casts were obtained. The images obtained by CT showed the vascular and biliary system using a soft tissue window. For the identification of vascular and biliary structures, the 3D prints together with the 3D reconstructions were analyzed, and the results were compared with the casts obtained with epoxy resin. Each of the arterial, venous and biliary branches associated with each of the liver lobes were identified with the help of the printings. In conclusion, the creation of 3D prototypes of nonpathological feline hepatic parenchyma can be used in the veterinary clinic as a basis for the detection of pathological problems in addition to obtaining future pathological hepatic 3D models.
  • Thumbnail Image
    Publication
    Open Access
    Is extracellular matrix (ECM) a promising scaffold biomaterial for bone repair?
    (Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2021) Gu, Ranli; Liu, Hao; Zhu, Yuan; Liu, Xuenan; Wang, Siyi; Liu, Yunsong
    The increasing demand for bone grafts and the scarcity of donors worldwide are promoting researchers to seek alternatives. The extracellular matrix (ECM) has been reported to enhance properties of osteoconduction and osteoinduction by simulating the molecular structure of bone and facilitating cell infiltration for bone repair. As one of several novel biomaterials, ECM has many desirable properties, including biocompatibility, bioactivity, and biosafety. Thus, we evaluated whether ECM is a promising scaffold biomaterial for bone repair. In this review, we explore ECM composition, the sources and fabrication methods, especially the decellularization technique, of ECM scaffolds. Furthermore, we highlight recent progress in the use of ECM as a scaffold biomaterial for bone repair. Generally, ECM is used in 1) threedimensional (3D) cell cultures to promote osteogenic differentiation, 2) combinations with other biomaterials to increase their osteogenic effects, 3) 3D printing to produce customized or patient-tailored scaffolds for bone repair, and 4) hydrogels derived from ECM used for bone repair. In addition, we focus on future prospects for application of ECM as a scaffold material used for bone repair. From this review, we expect to have a perfect understanding of ECM-based scaffold materials in the hope that this leads to further research of the production of ECM biomaterials to meet the clinical needs for bone repair.
  • Thumbnail Image
    Publication
    Open Access
    Modelización 3D de última generación y simulación mediante dispositivos de realidad virtual para mejorar el proceso de enseñanza-aprendizaje de cirugía hepatobiliar con alumnos de medicina
    (Universidad de Murcia, Servicio de Publicaciones, 2024) López López, Víctor; Navarro Barrios, Álvaro; Brusadin, Roberto; Crespo, María Jesús; Sánchez Esquer, Ignacio; Mezquita, Carmen; Iniesta, María; López Conesa, Asunción; Robles Campos, Ricardo; de la Cruz, Juan
    Los nuevos dispositivos de modelización 3D de última generación y simulación con gafas de realidad virtual suponen una nueva herramienta que puede ser utilizada con para mejorar la compresión de la cirugía hepatobiliar en los estudiantes de medicina. Entre septiembre de 2022 y enero de 2024 realizamos un estudio prospectivo entre los alumnos de medicina de 4º curso. Se implementó una nueva metodología docente basada en innovaciones tecnológicas centradas en 3D de última generación. Mediante una encuesta se valoraron índices de satisfacción, utilidad, mejora, implementación, compresión y motivación. Un total de 46 alumnos contestaron al cuestionario. Un 95,7% estaban de acuerdo con que los modelos virtuales 3D y la realidad virtual favorecen a mostrar un mayor interés por la clase sin ninguna respuesta desfavorable al respecto. Un 95,7% coinciden con que la utilización de modelos impresos en 3D deberían tener más presencia en las clases de cirugía. Un 97,8% estaban de acuerdo en que los vídeos quirúrgicos asistidos por reconstrucciones 3D deberían tener más presencia en las aulas. Los resultados de este estudio respaldan la efectividad y la aceptación de la metodología docente basada en tecnología 3D en la enseñanza de la anatomía quirúrgica hepática.
  • Thumbnail Image
    Publication
    Restricted
    Primary maxillary reconstruction with fibula flap and dental implants: a comparative study between virtual surgical planning and standard surgery in class IIc defects
    (Elsevier, 2021-01) Navarro Cuéllar, Carlos; Bullejos Martínez, Elena; Navarro Cuéllar, Ignacio; López López, Ana M.; Tousidonis Rial, Manuel; Sánchez Pérez, Arturo; Salmerón Escobar, José I.; Dermatología, Estomatología, Radiología y Medicina Física
    Purpose: Oncological patients who undergo bilateral subtotal maxillectomies develop functional and esthetic sequelae that require immediate reconstruction. The purpose of this study is to evaluate the primary reconstruction of maxillary defects with fibula flap and dental implants assisted by virtual surgical planning (VSP) and to assess the postoperative outcomes compared with standard surgery. Material and methods: A retrospective study was designed between January 2016 and April 2020 with 12 oncologic patients who underwent subtotal bilateral maxillectomy. Six consecutive patients were treated by standard surgical procedure (SS) at the beginning of the study. In 2018, the VSP was implemented, and 6 consecutive patients were treated using this technique. All patients were rehabilitated with Ticare implants and implant prostheses. Anatomic position of the bone, bone apposition, change of vertical distance, and horizontal shift, the operative and ischemia time, the esthetic results, and the functional rehabilitation were evaluated and compared. Results: The position of the bone in anatomical position was 100% in the VSP group vs 66% in the SS group. The bone apposition was 100% in the VSP group vs 83.3%. The change of vertical distance and the horizontal shift were lower in the VSP group (P < .05). The ischemia time and operative time were shorter in the VSP group (P < .05). A good esthetic result was achieved in 83.3% in the VSP group vs 33.3% in the SS group; 81 dental implants and 1 zygomatic implant were placed. The success rate was 95% in the VSP group and 92.6% in the SS group. All patients were rehabilitated with implant prosthesis. Conclusions: VSP improves the accuracy of midface reconstruction (class IIC defect) with a better anatomical position of the bone, a higher rate of bone contact, and a lower change in vertical distance compared with standard surgery. It significantly improves the esthetic result, reduces ischemia time, and operation time.
  • Thumbnail Image
    Publication
    Open Access
    Three-dimensional printed model and virtual reconstruction: an extra tool for pediatric solid tumors surgery
    (Georg Thieme Verlag KG, 2018-10-18) Sánchez Sánchez, Ángela; Girón Vallejo, Óscar; Ruiz Pruneda, Ramón; Fernández Ibieta, María; García Calderón, Darío; Villamil, Vanesa; Giménez Aleixandre, María Cristina; Montoya Rangel, Carlos Andrés; Hernández Bermejo, Juan Pedro; Cirugía, Pediatría y Obstetricia y Ginecología
    Introduction Three-dimensional (3D) technology is increasingly applied for planning challenging surgical interventions. We report our experience using 3D printing and virtual reconstruction for surgical planning of complex tumor resections in children. Methods Data were obtained from preoperative magnetic resonance. imaging analysis and 3D virtual recreations were performed using specialized computer software. 3D real-scale geometry models, including tumor, adjacent organs, and relevant vascularization, were printed in colorimetric scale and different materials for optimal structures discrimination. Results Four complex cases were selected. The first case was a bilateral Wilms tumor. The volumetric reconstruction proved the presence of enough healthy renal tissue, allowing bilateral nephron-sparing surgery. In the second case, reconstruction contributed to the location of pulmonary metastases. The third case was an abdominal neuroblastoma stage L2. The 3D model was of high value for planning and as a reference during the intervention. The last case is a cervico-thoracic neuroblastoma with an anatomopathological diagnosis of ganglioneuroma, located at the cervico-mediastinal juncture, in close relationship with the cervical vessels. Conclusions 3D reconstruction and the full-scale printing models are a useful tool in cases of complex tumor resections as they contribute to a better understanding of the relationships between the tumor and adjacent organs, helping to anticipate certain surgical complications. They also provide additional information to conventional imaging tests, being able to influence therapeutic decisions and facilitate the understanding by the family, improving doctor–patient communication