Influence of porous titanium-based jaw implant structure on osseointegration mechanisms.

Autor: Kilina P; Department of Innovative Engineering Technologies, Perm National Research Polytechnic University, 614990, Perm, 29 Komsomolskiy Avenue, Russia; Biofluids Laboratory, Perm National Research Polytechnic University, 614990, Perm, 11 Professor Pozdeev Street, Russia. Electronic address: kilinapn@mail.ru., Kuchumov AG; Biofluids Laboratory, Perm National Research Polytechnic University, 614990, Perm, 11 Professor Pozdeev Street, Russia; Department of Computational Mathematics, Mechanics and Biomechanics, Perm National Research Polytechnic University, 614990, Perm, 29 Komsomolskiy Avenue, Russia. Electronic address: kychymov@inbox.ru., Sirotenko L; Department of Innovative Engineering Technologies, Perm National Research Polytechnic University, 614990, Perm, 29 Komsomolskiy Avenue, Russia. Electronic address: sirotenko@pstu.ru., Vassilouk V; Department of Maxillofacial Surgery, Perm State Medical University, 614990, Perm, 29 Petropavlovskaya Street, Russia. Electronic address: vasilyuk.vladimir53@mail.ru., Golovin S; Bioengineering and Veterinary Medicine Faculty, Don State Technical University, 344000, Rostov-on-Don, 1 Gagarin Square, Russia., Drozdov A; Department of Innovative Engineering Technologies, Perm National Research Polytechnic University, 614990, Perm, 29 Komsomolskiy Avenue, Russia; Biofluids Laboratory, Perm National Research Polytechnic University, 614990, Perm, 11 Professor Pozdeev Street, Russia., Sadyrin EV; Laboratory for Mechanics of Biomaterials, Don State Technical University, 344000, Rostov-on-Don, 1 Gagarin Square, Russia. Electronic address: e.sadyrin@sci.donstu.ru.
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2024 Dec; Vol. 160, pp. 106724. Date of Electronic Publication: 2024 Sep 12.
DOI: 10.1016/j.jmbbm.2024.106724
Abstrakt: The reconstruction of maxillofacial defects caused by anomalies, fractures, or cancer is challenging for dentofacial surgeons. To produce efficient, patient-specific implants with long-term performance and biological suitability, numerous methods of manufacturing are utilized. Because additive manufacturing makes it possible to fabricate complex pore structure samples, it is now recognized as an acceptable option to design customized implants. It is well recognized that a porous structure with proper design promotes accelerated cell proliferation, which enhances bone remodeling. Porosity can also be employed to modify the mechanical characteristics of fabricated implants. Thus, design and choice of rational lattice structure is an important task. The influence of the structure of jaw implants made of highly porous titanium-based materials on their mechanical properties and bone tissue growth was studied. Based on a 3D computer model of Wigner-Seitz lattice structure, the model samples were fabricated from Ti6Al4V powder by selective laser melting to characterize the mechanical properties of the samples depending on their macroporosity. Then two types of jaw bone implants were manufactured to conduct studies of bone tissue ingrowth when implanted in laboratory animals. The research was carried out in several stages: design and production of the implants for replacing incomplete defects of the lower jaw; implantation of SLM-printed implants in laboratory animals into an artificially produced defect of the lower jaw; analysis of the degree of fixation of the "implant - bone" connection (for implantation periods from 2 weeks to 9 months). During the research, Ti-alloy structures with cell diameters of 2-3 mm and macroporosity of 90-97% mimicking the spongy structure of trabecular bone tissue, were characterized by a compressive strength of 12.47-37.5 MPa and an elastic modulus of 0.19-1.23 GPa, corresponding to the mechanical properties of bone tissue. Active processes of tissue growth into implant cells were detected 2 weeks after implantation, the significant differences in the volume and types of filling tissue depending on the size of the cell were described. Recommendations for choosing the cell size depending on the type of bone tissue damage were given. When using SLM-printed implants with lattice structure (cell sizes from 1 to 3 mm), an active osteosynthesis processes occurred, which culminated in the formation of bone tissue inside the implant cells 9 months after implantation, with 68% of the samples characterized by the maximum degree of implant fixation. Implants with 3 mm cells with macropores diameters of 850 μm were recommended for replacing cavities after removal of perihilar cysts. To replace complete and partial defects, it was recommended to use implants with a cell size of 2 and 3 mm.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Alex G. Kuchumov reports financial support was provided by Ministry of Science and Higher Education of the Russian Federation. Evgeniy Sadyrin and Polina Kilina reports financial support was provided by Russian Science Foundation.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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