An 18-year-old male patient with a high-grade osteosarcoma was initially treated with resection and reconstruction using an osteochondral allograft. The allograft collapsed after five years, and thus a revision with a constrained knee prosthesis was performed. After one year, the implant failed due to a fracture, requiring another revision with a new allo-prosthetic composite. The long-term results were satisfactory. Allo-prosthetic composites may offer good long-term results after sarcoma resection. The failure of a massive bone allograft does not preclude the use of another allograft to maintain the bone stock and preserve the function.
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http://dx.doi.org/10.7759/cureus.12172 | DOI Listing |
JBJS Case Connect
January 2025
Department of Orthopedic Surgery, Shariati Hospital and School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Case: In this article, we present 2 cases of neglected patellar tendon rupture. One was treated using an Achilles tendon allograft, and the other with a patellar tendon-bone allograft. Both methods allowed for early range of motion and resulted in good functional outcomes with a 1-year follow-up period.
View Article and Find Full Text PDFJ Biomater Sci Polym Ed
January 2025
Department of Biomaterials, Faculty of Science, Iran Polymer and Petrochemical Institute, Tehran, Iran.
Bone disorders have increased with increasing the human lifespan, and despite the tissue's ability to self-regeneration, in many congenital problems and hard fractures, bone grafting such as autograft, allograft, and biomaterials implantation through surgery is traditionally used. Because of the adverse effects of these methods, the emergence of injectable hydrogels without the need for surgery and causing more pain for the patient is stunning to develop a new pattern for hard tissue engineering. These materials are formed with various natural and synthetic polymers with a crosslinked network through various chemical methods such as click chemistry, Michael enhancement, Schiff's base and enzymatic reaction and physical interactions with high water absorption which can mimic the environment of cells.
View Article and Find Full Text PDFJ Funct Biomater
December 2024
Department and Institute of Oral Surgery, Wroclaw Medical University, Krakowska 26 Street, 50-425 Wrocław, Poland.
Background: The impact of tongue protrusion forces on the formation of malocclusions is well documented in academic literature. In the case of bone dehiscence of the buccal wall in front of the lower frontal teeth, this process may be even more pronounced. Augmentation with 3D customized allogenic bone blocks (CABB) has been proposed as a potential solution for treating such defects.
View Article and Find Full Text PDFJ Plast Reconstr Aesthet Surg
November 2024
Yale School of Medicine, Division of Reconstructive and Plastic Surgery, New Haven, CT, USA. Electronic address:
Background: The long-term stability of allograft or native bone in facial vascularized composite allograft (fVCA) recipients is unclear. This study quantified long-term bone volume changes in facial transplants.
Methods: Computed tomography scans of eight fVCA recipients (2011-2023) were analyzed with Materialise Mimics.
Adv Healthc Mater
January 2025
Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, No.44-1 Wenhua Road West, Jinan, Shandong, 250012, China.
Bone defects caused by fractures and diseases often do not heal spontaneously. They require external agents for repair and regeneration. Bone tissue engineering is emerging as a promising alternative to traditional therapies like autografts and allografts.
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