RESEARCH PAPER
Material Characteristic of an Innovative Stent for the Treatment of Urethral Stenosis
1
Faculty of Mechanical Engineering, Department of Biomedical Engineering, University of Zielona Góra, ul. Prof. Z. Szafrana 4, 65-516 , Zielona Góra, Poland
Submission date: 2023-02-24
Acceptance date: 2023-05-03
Online publication date: 2023-07-16
Publication date: 2023-09-01
Acta Mechanica et Automatica 2023;17(3):477-484
KEYWORDS
ABSTRACT
The appropriate development and customisation of the stent to the urethral tissues requires the determination of many factors such as strength and degradation. Given the distinctive conditions of urethral tissues, it is important that the design of the stent be properly developed. The selection of a stent material requires knowing its material characteristics and verifying that they are suitable for the future implantation site. In the present study, the development of a polydioxanone (PDO)-based stent was undertaken. The PDO material was fabricated using an additive technique – 3D printing. Then, in vitro tests were performed to determine the degradation time of the material under conditions simulating an aggressive urinary environment. The changes in the parameters of mechanical properties before and after the degradation period were determined, and the changes in the structure of the material before and after degradation were observed. Numerical analysis was performed for the proposed stent design. The results showed that PDO has good mechanical properties, but its degradation time is too short to be used in a urethral stent. Among the innovations of the studies conducted are bending strength tests, which is not a frequently considered aspect so far.
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