Clinical Applications of "In-Hospital" 3D Printing in Hip Surgery: A Systematic Narrative Review.

Introduction: Interest in 3D printing for orthopedic surgery has been increasing since its progressive adoption in most of the hospitals around the world. The aim of the study is to describe all the current applications of 3D printing in patients undergoing hip surgery of any type at the present time. Materials and Methods: We conducted a systematic narrative review of publications indexed in MedLine through the search engine PubMed, with the following parameters: 3D printing AND (orthopedics OR traumatology) NOT tissue engineering NOT scaffold NOT in vitro and deadline 31 July 2023. After reading the abstracts of the articles, papers were selected according to the following criteria: full text in English or Spanish and content related to hip surgery. Those publications involving experimental studies (in vitro or with anatomical specimens) or 3D printing outside of hospital facilities as well as 3D-printed commercial implants were excluded. Results are presented as a reference guide classified by disease, including the used software and the steps required for the development of the idea. Results: We found a total of 27 indications for in-house 3D printing for hip surgery, which are described in the article. Conclusions: There are many surgical applications of 3D printing in hip surgery, most of them based on CT images. Most of the publications lack evidence, and further randomized studies should be encouraged to assess the advantages of these indications.

[Radiological and surgical characteristics of a case of recurring spinal hydatidosis]. / Caracteristicas radiologicas y quirurgicas de un caso de hidatidosis espinal recurrente.

INTRODUCTION: Hydatidosis is an illness that is still to be found in our setting. The lungs and liver are the organs most frequently involved and it rarely extends to bones. Involvement of the spine is infrequent, but it can give rise to a high degree of disability and may recur despite apparently complete excision. Here we report a case of recurring spinal hydatidosis with radiological and surgical particularities. CASE REPORT: Our case involves a 63-year-old male living in a rural area of the northern part of Spain's central plateau. The patient had a history of surgery for spinal hydatidosis and was on treatment with mebendazole. In the months before his visit, the patient had experienced difficulty in walking and urgency incontinence. The examination revealed paraparesis that predominantly affected the right-hand side and the patient required bilateral support to be able to walk. A dorso-lumbar magnetic resonance scan showed post-surgery changes with pedicular instrumentation added later in another centre, and a hydatid cyst with involvement of the body of the D10 vertebra, epidural extension and compression of the spinal cord. The patient was submitted to a surgical procedure involving the extraction of the system of fixation and full macroscopic excision of the cyst, with partial resection of the body of the vertebra. Initially the patient displayed motor improvement and treatment with mebendazole was reintroduced in high doses. CONCLUSIONS: Spinal hydatidosis is a rare condition that, in spite of correct surgical and medical treatment, often recurs. Magnetic resonance scans show characteristic 'honeycomb' images, which are sometimes large and have their origins in the body of the vertebra. Although successive surgical interventions can become increasingly more difficult because of old instrumentation or the conservation of compromised vertebral bodies, aggressive excision is indicated while the patient still has useful neurological functioning.

Características radiológicas y quirúrgicas de un caso de hidatidosis espinal recurrente / Radiological and surgical characteristics of a case of recurring spinal hydatidosis

Introducción. La hidatidosis es una enfermedad aún presente en nuestro entorno. El pulmón y el hígado son los órganos implicados con más frecuencia y rara vez hay una extensión ósea. La afectación espinal es infrecuente y puede dar lugar a gran discapacidad y recurrir pese a exéresis aparentemente completas. Presentamos un caso de hidatidosis espinal recurrente con particularidades radiológicas y quirúrgicas. Caso clínico. Varón de 63 años, residente en un área rural de la meseta norte española. Antecedente de hidatidosis espinal intervenida y en tratamiento con mebendazol. Consultó por empeoramiento en los meses previos de su dificultad para la marcha y urgencia esfínteriana. En la exploración se objetivó una paraparesia de predominio derecho y marcha con requerimiento de apoyo bilateral. La resonancia magnética dorsolumbar mostró cambios posquirúrgicos con instrumentación pedicular posterior realizada en otro centro y quiste hidatídico con afectación del cuerpo vertebral D10, extensión epidural y compresión medular. Se llevó a cabo una intervención quirúrgica consistente en la extracción del sistema de fijación y exéresis macroscópica completa del quiste, con resección parcial del cuerpo vertebral. Se apreció una mejoría motora inicial y se reintrodujo el tratamiento con mebendazol en dosis altas. Conclusiones. La hidatidosis espinal es una entidad poco frecuente que, pese a un adecuado tratamiento quirúrgico y médico, recurre con frecuencia. La resonancia magnética muestra imágenes características en ‘panal de abeja’, en ocasiones de gran tamaño y con origen en el cuerpo vertebral. Aunque las intervenciones quirúrgicas sucesivas plantean dificultades relacionadas con instrumentaciones antiguas o la conservación de cuerpos vertebrales afectos, la exéresis agresiva está indicada mientras el paciente mantenga una función neurológica útil(AU)

Introduction. Hydatidosis is an illness that is still to be found in our setting. The lungs and liver are the organs most frequently involved and it rarely extends to bones. Involvement of the spine is infrequent, but it can give rise to a high degree of disability and may recur despite apparently complete excision. Here we report a case of recurring spinal hydatidosis with radiological and surgical particularities. Case report. Our case involves a 63-year-old male living in a rural area of the northern part of Spain’s central plateau. The patient had a history of surgery for spinal hydatidosis and was on treatment with mebendazole. In the months before his visit, the patient had experienced difficulty in walking and urgency incontinence. The examination revealed paraparesis that predominantly affected the right-hand side and the patient required bilateral support to be able to walk. A dorsolumbar magnetic resonance scan showed post-surgery changes with pedicular instrumentation added later in another centre, and a hydatid cyst with involvement of the body of the D10 vertebra, epidural extension and compression of the spinal cord. The patient was submitted to a surgical procedure involving the extraction of the system of fixation and full macroscopic excision of the cyst, with partial resection of the body of the vertebra. Initially the patient displayed motor improvement and treatment with mebendazole was reintroduced in high doses. Conclusions. Spinal hydatidosis is a rare condition that, in spite of correct surgical and medical treatment, often recurs. Magnetic resonance scans show characteristic ‘honeycomb’ images, which are sometimes large and have their origins in the body of the vertebra. Although successive surgical interventions can become increasingly more difficult because of old instrumentation or the conservation of compromised vertebral bodies, aggressive excision is indicated while the patient still has useful neurological functioning(AU)