Using Rapid Prototyping Technologies for Creating Implants with Cellular Structure
Polina Nikolaevna Kilina1 , Vladimir PavlovichVasilyuk2 , Evgeniy Aleksandrovich Morozov1, Almaz Mullayanovich Khanov1 and Lyudmila Dmitrievna Sirotenko2
1Perm National Research Polytechnic University, Russia, 614990, Perm, Komsomolskyprospekt, 29 2Perm State University of Medicine named after Academician E.A.Wagner Russia, 614990, Perm, Petropavlovskayastreet, 26
ABSTRACT: The paper presents the results of using rapid prototyping technology for obtaining implants that consist of Wigner-Seitz cellular structures. Using the method of stereolithography, prototypes from EnvisionTec SI 500 photopolymer were obtained at the EnvisionTec Perfactory Xede installation; 200 watts gas (CO²) laser was used in the process. The possibility of creating cellular materials with complex spatial structure has been shown. Laser sintering was performed at the Realizer SLM 50 installation, and argon was used for protective atmosphere in the working chamber. A 250 W 680 nm fiber laser was used in the process. The source material was 316L stainless steel powder. Sintering was performed on a steel substrate with radiation intensity of 1,500 mA and 60 μs exposure time. Implants were obtained in the form of cells and tubes filled with cells that were implanted into outbred rats at the base of tail. Six months observation of the animals did not reveal rejection of implants, and the integral indicators (behavior, appetite, temperature reaction) were in the normal range. A 3D model of jaw implant was created using the Delcam Power Shape software suite. Initial material in the experiment was titanium powder with particle of an average size of 30 μm, which had the shape close to spherical. Samples were sintered at intensities of radiation of 1,000 mA, 1,400 mA, and 1,700 mA. In order to reduce samples manufacturing time while maintaining integrity of the Wigner-Seitz cell structure without thinning walls, layer dissection distance of 0.1 mm was chosen.
KEYWORDS: 3D model; rapid prototyping; selective laser sintering; Wigner-Seitz cell; mesh implants; metal powdersDownload this article as:
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Kilina P. N, Vasilyuk V. P, Morozov E. A, Khanov A. M, Sirotenko L. D. Using Rapid Prototyping Technologies for Creating Implants with Cellular Structure. Biosci Biotech Res Asia 2015;12(2)