1
|
Lu YC, Hsu LI, Lin CF, Hsu CP, Chang TK, Cheng CC, Huang CH. Biomechanical characteristics of self-expanding sinus stents during crimping and deployment_A comparison between different biomaterials. J Mech Behav Biomed Mater 2023; 138:105669. [PMID: 36634436 DOI: 10.1016/j.jmbbm.2023.105669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
Self-expanding sinus stents are often used in functional endoscopic sinus surgery to treat inflamed sinuses. The PROPEL self-expanding sinus stent offers mechanical support to the sinus cavity to prevent restenosis. The stent is made of a bioabsorbable material (PLGA) that disappears after wound healing. However, complications such as foreign body sensation and severe stent migration/expulsion have been reported after implantation. Little is known about the contact characteristics of self-expanding sinus stents from when the stent is crimped into the insertion device through to deployment into the sinus cavity. This current study developed a test platform to analyze the biomechanical behavior of the stent during this process. Three common bioabsorbable materials, PLGA, PCL and Mg alloy, were evaluated to understand how the choice of material affects the biomechanical characteristics of self-expanding sinus stents. The results showed that the material can have a considerable influence on the contact characteristics during crimping and deployment. When crimped, the PLGA and Mg alloy stents showed much higher plastic strain and contact stress than the PCL stent. When deployed, the PCL stent had the largest contact area (4.3 mm2) and the lowest contact pressure (0.1 MPa) on the inner surface of the sinus canal. The results indicate that PCL could be a suitable choice for self-expanding sinus stents. This current study provides a method for observing the biomechanical characteristics of sinus stents during stent crimping and deployment.
Collapse
Affiliation(s)
- Yung-Chang Lu
- Biomechanics Research Laboratory, Department of Medical Research, MacKay Memorial Hospital, Taiwan; Department of Medicine, MacKay Medical College, Taipei, Taiwan
| | - Lin-I Hsu
- Biomechanics Research Laboratory, Department of Medical Research, MacKay Memorial Hospital, Taiwan; Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chih-Feng Lin
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-Pin Hsu
- High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Ting-Kuo Chang
- Biomechanics Research Laboratory, Department of Medical Research, MacKay Memorial Hospital, Taiwan; Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chung-Chih Cheng
- Medical and Pharmaceutical Industry Technology and Development Center, New Taipei City, Taiwan
| | - Chang-Hung Huang
- Biomechanics Research Laboratory, Department of Medical Research, MacKay Memorial Hospital, Taiwan; Department of Medicine, MacKay Medical College, Taipei, Taiwan; Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei, Taiwan; School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| |
Collapse
|