Modeling Degradation Behavior of Biodegradable Polymers for Medical Devices: A Comparative Review of Phenomenological and Stochastic Approaches

IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL
Saeed Sanjari, Payam Saraeian, Shahram Etemadi Haghighi, Ali Alinia-ziazi
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Abstract

Biodegradable polymers have a high potential in making medical devices such as absorbable esophageal and vascular stents, bone, orthopedic screws and pins, etc. One of the main challenges of using biodegradable polymers as medical devices is the loss of mechanical characteristics due to degradation. Various factors affect the degradation rate of polymers according to the environmental conditions of using these types of devices. Knowing the structural equations governing the degradation rate of polymers and predicting their mechanical performance over time are important issues that lead to the optimal design of polymer devices and their mechanical performance before clinical use and in vivo tests. The degradation behavior of biodegradable polymers can be modeled with three different approaches: “phenomenological methods,” “stochastic/probabilistic methods,” and “physio-chemical methods.” Each approach and sub-branches have used different laws and assumptions to obtain the structural degradation equations. This article reviews the types of techniques used in modeling the degradation behavior of biodegradable polymers, structural equations governing and the degradation of biodegradable polymers using the phenomenological and stochastic/probabilistic approach. The achievements and limitations of each method are discussed and analyzed. Physio-chemical methods will be discussed in another article the author intends to publish.

Graphic Abstract

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医疗器械用生物可降解聚合物降解行为建模:现象学方法与随机方法比较评述
生物可降解聚合物在制造可吸收食道和血管支架、骨、矫形螺钉和针等医疗器械方面具有很大潜力。将生物可降解聚合物用作医疗器械的主要挑战之一是降解导致的机械特性损失。根据这类设备的使用环境条件,各种因素都会影响聚合物的降解率。了解制约聚合物降解率的结构方程并预测其随着时间推移的机械性能,是在临床使用和体内测试前优化聚合物设备设计及其机械性能的重要问题。生物可降解聚合物的降解行为可以用三种不同的方法来模拟:"现象学方法"、"随机/概率方法 "和 "物理化学方法"。每种方法及其分支都使用不同的规律和假设来获得结构降解方程。本文回顾了生物降解聚合物降解行为建模技术的类型、生物降解聚合物降解的结构方程以及使用现象学方法和随机/概率方法的降解情况。讨论和分析了每种方法的成就和局限性。物理化学方法将在作者打算发表的另一篇文章中讨论。
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来源期刊
Journal of Polymers and the Environment
Journal of Polymers and the Environment 工程技术-高分子科学
CiteScore
9.50
自引率
7.50%
发文量
297
审稿时长
9 months
期刊介绍: The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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