The effects of different grading approaches in additively manufactured dental implants on peri-implant bone stress: A finite element analysis.

Autor: Akbas O; Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany., Greuling A; Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany. Electronic address: greuling.andreas@mh-hannover.de., Stiesch M; Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2024 Jun; Vol. 154, pp. 106530. Date of Electronic Publication: 2024 Mar 27.
DOI: 10.1016/j.jmbbm.2024.106530
Abstrakt: Additive manufacturing enables local grading of the stiffness of dental implants through targeted adjustment of the manufacturing parameters to meet patient specific requirements. The extent to which such a manufacturing approach affects the interaction between the implant body and the surrounding bone, and what grading is optimal, is currently insufficiently investigated. This study investigates the effect of different Young's modulus grading approaches on stresses in the peri-implant bone via finite element analysis. The implant geometry was kept constant and in the case of the implant a node-dependent elastic modulus was assigned. In this way, a vertical, a radial and three torus based grading approaches were created and examined. A load was then applied directly to the occlusal surface of the implant crown. It was found that a local grading utilizing a torus shape was most favourable in terms of an effective stress peak reduction. The best torus shape tested achieved a 22 % reduction of maximum principal stress and 6 % reduction of minimum principal stress compared to the uniform material. In clinical settings, this may provide benefits in situations of overload. Based on the results, a graded stiffness in dental implants appears to be of interest for developing advanced, patient-specific implant solutions.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Andreas Greuling reports financial support was provided by German Research Foundation. Meike Stiesch reports financial support was provided by German Research Foundation. Osman Akbas reports financial support was provided by German Research Foundation. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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