DESIGN OF SPECIALIZED SURGICAL SCREW INSERTED IN PLATE TYPE CERVICAL IMPLANT
Keywords:cervical implant, FEM analysis, surgical screw, ANSYS analysis, implementation
In the field of Implantology the screws are an important part because they transfer the loads that occur in the bones. Surgical screws are similar to those in Mechanical Engineering, but the materials should have specific characteristics like biocompatibility, strength, corrosion resistance and fatigue strength. The main function of the surgical screw is to create pressure between two bones which is necessary in order to heal the injured bones. The surgical screw transforms all forces of the movements to pressure and distributes the pressure on the bone’s surfaces. Surgical screws can help in the setting of implants into an injured area. It also ensures static position of the injured bones. The research aims to analyse how the surgical screw type affects the bone of the patient with the help of the Finite Elements Method (FEM). Based on the results from the analysis of the surgical screw a new specialized surgical screw was designed with complex geometry to withstand the occurring loads and also be able to transfer them to the bone tissue. In additional, a comparison analysis between two different types of surgical screws was conducted. This paper shows how a surgical screw could be optimized in order to improve its function with the help of virtual tools. Finally, the materials used are biocompatible and often used for such screws and surgical implant analysis, the challenge was to recreate the bone tissue properties and to used them in the FEM analysis.
ASTM-American Society for Testing and Materials. (2018). Spine corpectomy model ASTM F1717. Retrieved from Standart Test Methods for Spinal Implant Construct in a Vertebrectomy Model: https://tinyurl.com/9e58eyv4
Cornelius,C., Gellrich, N., Hillerup, S., Kusumoto, K., Schubert, W. (2016). Choice of implants. Retrieved from https://surgeryreference.aofoundation.org/cmf/trauma/midface/further-reading/choice-of-implants#introduction
International Organization for Standardization (1991). Implants for surgery — Metal bone screws with hexagonal drive connection, spherical under-surface of head, asymmetrical thread — Dimensions. Retrieved from ISO 5835(en): https://www.iso.org/obp/ui/fr/#iso:std:iso:5835:ed-1:v1:en
Kamberov, K., Todorov, G., Sofronov, Y., Nikolov, N. (2020). Methodology for designing, manufacturing and integration of personalized spinal implants for surgical treatment of the cervical spine. 46 Conference "Applications of Mathmatics in Technics and Economics"-AMEE, 2333, pp 1100091-1100095 (https://doi.org/10.1063/5.0042381),
Landolt, D. (2007). Corrosion and Surface Chemistry of Metals. New York: EPFL Press, https://doi.org/10.1201/9781439807880
Neoh, K., Hu,X., Zheng, D., Kang, E..(2012). Balancing osteoblast functions and bacterial adhesion on functionalized titanium surfaces. doi: 10.1016/j.biomaterials.2012.01.018.
De Viteri, V., Fuentes, E. (2013). Titanium and Titanium Alloys as Biomaterials. Retrieved from Intechopen: https://www.intechopen.com/chapters/44858
Semkov, M., Dimova, K. (2020). Comparison of Stress distribution on Periodontally Compromised Mobile Teeth splinted and non-splinted using Finite Element Method. 46 Conference "Applications of Mathmatics in Technics and Economics"-AMEE, 2333, pp 110010-1-110010-6 (DOI:10.1063/5.0044796).
Todorov, G., Kamberov, K. (2017). Virtual engineering. Sofia: Direct Services Ltd, ISBN 978-619-7171-15-0.
Todorov, G., Nikolov, N., Sofronov, Y., Gabrovsky, N., Laleva, M., Gavrilov, T. (2018). Computer Aided Design оf Customized Implants Based On Ct-Scan Data аnd Virtual Prototypes. Future Access Enablers for Ubiquitous and Intelligent Infrastructures, pp. 339-346.
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