Radial Compressive Property and the Proof-of-Concept Study for Realizing Self-expansion of 3D Printing Polylactic Acid Vascular Stents with Negative Poisson’s Ratio Structure

Wu, Zichao; Zhao, Ji; Wu, Wenzheng; Wang, Peipei; Wang, Bofan; Li, Guiwei; Zhang, Shuo

doi:10.3390/ma11081357

Cited by 68 publications

(40 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More importantly, the radial and longitudinal size of the stent crimp under deformation temperature and expand at recovery temperature. This phenomenon demonstrates the feasibility of the shape memory effect of PLA as a reliable basic material for 3D printing stents [ 178 ]. Researchers developed a novel biodegradable polymer–graphene composite with dual drug incorporation.…”

Section: Stent Manufacture Techniquesmentioning

confidence: 84%

The Development of Design and Manufacture Techniques for Bioresorbable Coronary Artery Stents

Wang

Pang

et al. 2021

Micromachines

View full text Add to dashboard Cite

Coronary artery disease (CAD) is the leading killer of humans worldwide. Bioresorbable polymeric stents have attracted a great deal of interest because they can treat CAD without producing long-term complications. Bioresorbable polymeric stents (BMSs) have undergone a sustainable revolution in terms of material processing, mechanical performance, biodegradability and manufacture techniques. Biodegradable polymers and copolymers have been widely studied as potential material candidates for bioresorbable stents. It is a great challenge to find a reasonable balance between the mechanical properties and degradation behavior of bioresorbable polymeric stents. Surface modification and drug-coating methods are generally used to improve biocompatibility and drug loading performance, which are decisive factors for the safety and efficacy of bioresorbable stents. Traditional stent manufacture techniques include etching, micro-electro discharge machining, electroforming, die-casting and laser cutting. The rapid development of 3D printing has brought continuous innovation and the wide application of biodegradable materials, which provides a novel technique for the additive manufacture of bioresorbable stents. This review aims to describe the problems regarding and the achievements of biodegradable stents from their birth to the present and discuss potential difficulties and challenges in the future.

show abstract

Section: Stent Manufacture Techniquesmentioning

confidence: 84%

The Development of Design and Manufacture Techniques for Bioresorbable Coronary Artery Stents

Wang

Pang

et al. 2021

Micromachines

View full text Add to dashboard Cite

show abstract

“…Among them, PLA is widely used to make biodegradable stents due to its excellent biocompatibility and biodegradability. In addition, and the resulted polymeric stents have the mechanical properties perfectly meeting the requirements . Therefore, PLA was selected as the build material.…”

Section: Methodsmentioning

confidence: 99%

Experimental study of polymeric stent fabrication using homemade 3D printing system

Zhao

Zhou

Sun³

et al. 2019

Polymer Engineering & Sci

View full text Add to dashboard Cite

Biodegradable polymeric stents have received extensive attention due to the high efficiency in interventional therapy. Fabrication of well-defined polymeric stents still poses a significant fabrication challenge. This study aims to investigate the feasibility of using a homemade three-dimensional (3D) printing system to directly print customized polymeric stents. In the proposed system, a rotating shaft with controllable temperature and rotating speed has been integrated into a fused deposition modeling-based 3D printing system to support the printed stents stably in situ. In addition, the effects of operating conditions including the rotating speed, printing temperature, printing speed, and step distance on the dimensions of the 3D printed stents have been investigated. Furthermore, orthogonal experiments have been designed and performed to comprehensively explore the significance of each processing parameter. Finally, based on the obtained knowledge, polymeric stents with various structures have been successfully 3D printed using the homemade 3D printing system with relatively high shape fidelity. FIG. 7. Evaluation of the effects of operating conditions on the 3D printed stents. [Color figure can be viewed at wileyonlinelibrary.com] FIG. 8. Schematics and 3D printing results of three representative stent structures.

show abstract

“…However, the Arrowed stent is still in the initial stage of research, and its mechanical properties have not been rigorously scientifically studied. The Arrowed stent manufactured by Wu et al [ 119 ] using FDM technology (as shown in Figure 17 a) was of poor quality and required a long time of post-processing. The Ameer team [ 120 , 121 , 122 ] synthesized a new Arrowed degradable polymer stent ( Figure 17 b), and successfully achieved non-supported printing by using a new micro-continuous liquid interface manufacturing technology.…”

Section: Structure Design Of Vascular Stentsmentioning

confidence: 99%

Structural Design of Vascular Stents: A Review

Pan

Han

2021

Micromachines

View full text Add to dashboard Cite

Percutaneous Coronary Intervention (PCI) is currently the most conventional and effective method for clinically treating cardiovascular diseases such as atherosclerosis. Stent implantation, as one of the ways of PCI in the treatment of coronary artery diseases, has become a hot spot in scientific research with more and more patients suffering from cardiovascular diseases. However, vascular stent implanted into vessels of patients often causes complications such as In-Stent Restenosis (ISR). The vascular stent is one of the sophisticated medical devices, a reasonable structure of stent can effectively reduce the complications. In this paper, we introduce the evolution, performance evaluation standards, delivery and deployment, and manufacturing methods of vascular stents. Based on a large number of literature pieces, this paper focuses on designing structures of vascular stents in terms of “bridge (or link)” type, representative volume unit (RVE)/representative unit cell (RUC), and patient-specific stent. Finally, this paper gives an outlook on the future development of designing vascular stents.

show abstract

Radial Compressive Property and the Proof-of-Concept Study for Realizing Self-expansion of 3D Printing Polylactic Acid Vascular Stents with Negative Poisson’s Ratio Structure

Cited by 68 publications

References 30 publications

The Development of Design and Manufacture Techniques for Bioresorbable Coronary Artery Stents

The Development of Design and Manufacture Techniques for Bioresorbable Coronary Artery Stents

Experimental study of polymeric stent fabrication using homemade 3D printing system

Structural Design of Vascular Stents: A Review

Contact Info

Product

Resources

About