3D printing
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The alveolar-capillary interface is the key functional element of gas exchange in the human lung, and disruptions to this interface can lead to significant medical complications. However, it is currently challenging to adequately model this interface in vitro, as it requires not only the co-culture of human alveolar epithelial and endothelial cells but mainly the preparation of a biocompatible scaffold that mimics the basement membrane. This scaffold should support cell seeding from both sides, and maintain optimal cell adhesion, growth, and differentiation conditions. Our study investigates the use of polycaprolactone (PCL) nanofibers as a versatile substrate for such cell cultures, aiming to model the alveolar-capillary interface more accurately. We optimized nanofiber production parameters, utilized polyamide mesh UHELON as a mechanical support for scaffold handling, and created 3D-printed inserts for specialized co-cultures. Our findings confirm that PCL nanofibrous scaffolds are manageable and support the co-culture of diverse cell types, effectively enabling cell attachment, proliferation, and differentiation. Our research establishes a proof-of-concept model for the alveolar-capillary interface, offering significant potential for enhancing cell-based testing and advancing tissue-engineering applications that require specific nanofibrous matrices.
PURPOSE: Minimally invasive surgery (MIS) in neonates and infants presents technical challenges and is still unfamiliar to many paediatrics surgeons. This study aims to identify currently available simulators for neonatal/infant MIS training, to assess their validity, level of evidence, and related recommendations. METHODS: The review followed PRISMA guidelines and was registered in PROSPERO (CRD420250581050). Electronic search limited to English articles was performed through PubMed/MEDLINE, SCOPUS, Web of Science and Cochrane Database from January 2010 to June 2024. RESULTS: Out of 1084 identified records, 72 studies met the inclusion criteria and were analysed across general, gastrointestinal, thoracic, and urological MIS specialties. Recent efforts have led to the development of 3D-printed, animal-based, and hybrid models several of which showed high fidelity, skill differentiation, and educational value. Despite promising results, no universal MIS training model exists for neonate/infant patients, highlighting the need for structured, proficiency-based curricula. Overall, studies demonstrated moderate levels of evidence and recommendation, supporting integration of cost-effective simulation into paediatrics MIS training CONCLUSION: This systematic review highlights the need for validated, standardized simulation models and proficiency-based curricula to optimize neonate and infant MIS training and guide future research toward improving model fidelity, accessibility, and long-term educational outcomes.
Onkochirurgické operace vyžadující resekci předního segmentu dolní čelisti představují z hlediska funkční rekonstrukce jedny z nejnáročnějších výkonů. Dříve využívané rekonstrukce ocelovými dlahami vedly k vysoké morbiditě a neuspokojivým funkčním výsledkům. V posledních letech je na Klinice otorinolaryngologie a chirurgie hlavy a krku FN u sv. Anny v Brně preferováno využití technologie 3D předoperačního plánování. V prezentované kazuistice je detailně popsán postup virtuálního plánování, využití koncepčních 3D modelů a resekčních šablon a jsou diskutovány výhody a nevýhody využití 3D technologie při mandibulární rekonstrukci.
Oncological surgical procedures involving resection of the anterior segment of the mandible represent in terms of functional reconstruction one of the most challenging procedures. Previously used reconstruction methods with steel plates resulted in high morbidity and unsatisfactory functional outcomes. In recent years, the Department of Otorhinolaryngology and Head and Neck Surgery at St. Anne‘s University Hospital in Brno has preferred the use of 3D preoperative planning technology. The presented case report provides a detailed description of the virtual planning process, the use of conceptual 3D models and cutting guides, and discusses the advantages and disadvantages of using 3D technology in mandibular reconstruction.
- MeSH
- 3D tisk metody MeSH
- autologní štěp chirurgie transplantace MeSH
- lidé MeSH
- rekonstrukce mandibuly * metody přístrojové vybavení MeSH
- senioři MeSH
- transplantace kostí metody přístrojové vybavení MeSH
- zobrazování trojrozměrné metody MeSH
- Check Tag
- lidé MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
BACKGROUND: The objective of this study was to develop a novel method for creating highly detailed three-dimensional physical models of lung lobes, incorporating tumour morphology and surrounding structures, with the aim of improving the assessment of operability for central lung tumours. CASE PRESENTATION: A method was developed that uses standard computed tomography (CT) scans to mark the desired structures and generate a three-dimensional image for physical model creation. The generated STL files can be seamlessly integrated into virtual reality, allowing the sharing of selected CT scan data. Our approach has been successfully integrated into clinical practice, enabling multidisciplinary teams to make informed decisions for patients with central lung tumours. We have reduced the preparation time of physical models from 100 h to 18 h. CONCLUSIONS: The novel method, which employs 3D printing technology, has enhanced the assessment of operability for central lung tumours, thereby facilitating more precise decisions regarding patient management. This innovative approach has the potential to enhance patient outcomes by reducing complications and optimizing treatment planning.
- MeSH
- 3D tisk * MeSH
- anatomické modely * MeSH
- lidé MeSH
- nádory plic * diagnostické zobrazování chirurgie patologie MeSH
- plíce diagnostické zobrazování MeSH
- počítačová rentgenová tomografie MeSH
- zobrazování trojrozměrné * metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- kazuistiky MeSH
Mixed reality technology and three-dimensional (3D) printing are becoming more and morecommon in the field of medicine. During the COVID-19 pandemic and immediately after the restrictions had beeneased, many innovations were implemented in the teaching of future doctors. There was also interest in immersive techniques and 3D printing technology in anatomy teaching. However, these are not common implementations. In 2023, 3D prints and holograms in mixed reality technology were prepared for classes focused on the structure of the heart. They were used to teach students, who, with the support of engineers, could learn about the detailed structure of the heart and familiarize themselves with the new technologies that support the traditional model of learning on human cadavers. Students findthis possibility to be highly valuable. The article presents the process of preparing materials for classes and further implementation possibilities. The authors see an opportunity for the development of the presented technologies in students'teaching at various levels of education and the justification for increasingly widespread implementation.
- MeSH
- 3D tisk * MeSH
- anatomie * výchova MeSH
- augmentovaná realita * MeSH
- COVID-19 MeSH
- lidé MeSH
- srdce * anatomie a histologie MeSH
- vyučování MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- audiovizuální média MeSH
- časopisecké články MeSH
Three-dimensional printing (3DP) has gained popularity among scientists and researchers in every field due to its potential to drastically reduce energy costs for the production of customized products by utilizing less energy-intensive machines as well as minimizing material waste. The 3D printing technology is an additive manufacturing approach that uses material layer-by-layer fabrication to produce the digitally specified 3D model. The use of 3D printing technology in the pharmaceutical sector has the potential to revolutionize research and development by providing a quick and easy means to manufacture personalized one-off batches, each with unique dosages, distinct substances, shapes, and sizes, as well as variable release rates. This overview addresses the concept of 3D printing, its evolution, and its operation, as well as the most popular types of 3D printing processes utilized in the health care industry. It also discusses the application of these cutting-edge technologies to the pharmaceutical industry, advancements in various medical fields and medical equipment, 3D bioprinting, the most recent initiatives to combat COVID-19, regulatory frameworks, and the major challenges that this technology currently faces. In addition, we attempt to provide some futuristic approaches to 3DP applications.
- MeSH
- 3D tisk * MeSH
- bioprinting metody MeSH
- COVID-19 * MeSH
- farmaceutický průmysl MeSH
- lidé MeSH
- poskytování zdravotní péče MeSH
- SARS-CoV-2 izolace a purifikace MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
The utilization of 3D printing- digital light processing (DLP) technique, for the direct fabrication of microneedles encounters the problem of drug solubility in printing resin, especially if it is predominantly composed of water. The possible solution how to ensure ideal belonging of drug and water-based printing resin is its pre-formulation in nanosuspension such as nanocrystals. This study investigates the feasibility of this approach on a resin containing nanocrystals of imiquimod (IMQ), an active used in (pre)cancerous skin conditions, well known for its problematic solubility and bioavailability. The resin blend of polyethylene glycol diacrylate and N-vinylpyrrolidone, and lithium phenyl-2,4,6-trimethylbenzoylphosphinate as a photoinitiator, was used, mixed with IMQ nanocrystals in water. The final microneedle-patches had 36 cylindrical microneedles arranged in a square grid, measuring approximately 600 μm in height and 500 μm in diameter. They contained 5wt% IMQ, which is equivalent to a commercially available cream. The homogeneity of IMQ distribution in the matrix was higher for nanocrystals compared to usual crystalline form. The release of IMQ from the patches was determined ex vivo in natural skin and revealed a 48% increase in efficacy for nanocrystal formulations compared to the crystalline form of IMQ.
- MeSH
- 3D tisk * MeSH
- aplikace kožní MeSH
- imichimod * chemie aplikace a dávkování MeSH
- jehly * MeSH
- kožní absorpce MeSH
- kůže metabolismus MeSH
- lékové transportní systémy přístrojové vybavení MeSH
- mikroinjekce přístrojové vybavení MeSH
- nanočástice * chemie aplikace a dávkování MeSH
- polyethylenglykoly chemie aplikace a dávkování MeSH
- povidon chemie MeSH
- rozpustnost * MeSH
- uvolňování léčiv MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Standardem léčby lokálně či regionálně pokročilého karcinomu hrdla dělohy je definitivní chemoradioterapie, která kombinuje systémovou chemoterapii platinou se zevní radioterapií, kterou následuje intrakavitární, tzv. uterovaginální brachyterapie. Současným standardem brachyterapie karcinomu hrdla dělohy je MR navigovaná 4D-adaptivní brachyterapie. Díky MR navigaci je při každé frakci brachyterapie jasně patrný aktuální rozsah reziduálního nádorového postižení a pokrytí cílových objemů intrakavitární aplikací do dělohy. U více než třetiny pacientek však nejde cílové struktury pokrýt terapeutickou dávkou záření vzhledem k rozsahu onemocnění, aniž by bylo možné současně dodržet bezpečné dávkové limity na okolní zdravé tkáně. Ideálním řešením takové situace je využití možnosti intersticiální aplikace jehel do míst nepokrytých samotnou intrakavitární aplikací. Standardně dodávané aplikátory pro uterovaginální brachyterapii již intersticiální aplikaci obvykle umožňují, případně lze pro aplikaci intersticiálních jehel využít 3D tiskem vyrobené či upravené aplikátory. Cílem tohoto článku je ukázat praktický postup aplikace intersticiální brachyterapie v léčbě karcinomu hrdla dělohy ve Fakultní nemocnici v Hradci Králové.
The standard treatment for locally or regionally advanced cervical cancer is definitive chemoradiotherapy, which combines systemic cisplatin chemotherapy with external-beam radiotherapy followed by intracavitary, so-called uterovaginal brachytherapy. The current standard of brachytherapy for cervical cancer is MR-guided 4D-adaptive brachytherapy. Thanks to MR navigation, the current extent of residual tumor involvement and the coverage of target volumes by intracavitary application into the uterus is visible during each brachytherapy fraction. In more than a third of patients, however, it is impossible to cover the target structures with a therapeutic dose of radiation due to the extent of the disease, without observing safe dose limits for the surrounding healthy tissues simultaneously. The ideal solution to such a situation is to use the interstitial application of needles in places not covered by the pure intracavitary application. The standard supplied applicators for uterovaginal brachytherapy usually allow interstitial application or 3D-printed or modified applicators can be used for the application of interstitial needles. This article aims to show the practical procedure of using interstitial brachytherapy in the treatment of cervical cancer at the University Hospital in Hradec Králové.
The collection on Methods and Models in Mammary Gland Biology and Breast Cancer Research showcases recent advances in tools and models that enhance our understanding of mammary gland development and breast cancer. This collection includes sixteen articles, collectively addressing approaches to investigate key aspects of mammary gland biology and tumorigenesis, including hormonal signaling, tissue architecture, tumor microenvironment, and species-specific mammary development. The issue highlights innovations such as optimized progesterone receptor reporters, improved menopause models, and 3D-printed mammary epithelial structures. It also features advancements in organoid-based studies, in situ labeling of epithelial proliferation in large animals, preclinical models for breast cancer prevention, and high-resolution imaging techniques. Methodologies for studying macrophage-cancer cell interactions and lysosomal function are provided as step-by-step protocols. Additionally, review articles provide insights into diverse mammalian organoid systems, rat mammary tumor models, and strategies for modeling breast cancer metastasis. Together, these contributions advance mammary gland research by refining experimental approaches, expanding model diversity, and fostering translational applications in breast cancer.
- MeSH
- lidé MeSH
- mléčné žlázy lidské * patologie růst a vývoj fyziologie MeSH
- mléčné žlázy zvířat * patologie růst a vývoj fyziologie MeSH
- modely nemocí na zvířatech MeSH
- nádorové mikroprostředí fyziologie MeSH
- nádory prsu * patologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- úvodní články MeSH
- úvodníky MeSH
