Studies of the mechanical and thermal properties of cross‐linked poly(methylmethacrylate‐acrylic acid‐allylmethacrylate)‐modified bone cement
Studies of the mechanical and thermal properties of cross‐linked poly(methylmethacrylate‐acrylic acid‐allylmethacrylate)‐modified bone cement
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DOI：
10.1002/app.23239
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发表时间：
2006-06
影响因子：
3
通讯作者：
Y. Nien;Jason E Chen
中科院分区：
文献类型：
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作者：
Y. Nien;Jason E Chen
骨水泥是假体与骨之间的载荷分布填充物，也是骨科植入物中固定假体的一种方法。使用聚甲基丙烯酸甲酯(PMMA)作为骨水泥的缺点之一是骨水泥在聚合过程中收缩。骨水泥在聚合过程中的收缩可能会失去通过骨和骨水泥界面传递的良好载荷，是假体松动的一个来源。将一种交联型聚(甲基丙烯酸甲酯-丙烯酸-甲基丙烯酸烯丙酯)应用于骨水泥，因为该共聚物具有吸收体液和可控膨胀的能力，以补偿骨水泥在聚合过程中的收缩。本研究制备了交联型聚(甲基丙烯酸甲酯-丙烯酸-甲基丙烯酸烯丙酯)改性骨水泥，并用拉伸分析和动态力学分析对其进行了表征。结果表明，改性骨水泥能够提高骨水泥的力学性能。从动态力学分析可知，预聚交联聚(甲基丙烯酸甲酯-丙烯酸-甲基丙烯酸烯丙酯)粉末对水泥的转变温度和tanδ值有影响。从骨水泥的断口观察可以看出，改性骨水泥可以提高其断裂韧性。#2006威利期刊公司，应用波利姆科学杂志100：3727-3732,2006
Bone cement is used as load-distributing filler between the prosthesis and the bone, as well as a method to anchor prosthesis in orthopedic implants. One of the disadvantages of using polymethylmethacrylate (PMMA) as bone cement is shrinkage of the cement during polymerization. Shrinkage of the cement during polymerization may lose the good load transfer through the interface between the bone and bone cement, and is a source of prosthetic loosening. A crosslinked poly(methylmethacrylate-acrylic acid-allylmethacrylate) was applied to bone cement, because it was found that this copolymer exhibits the ability to absorb body fluids and swell in a controlled manner to compensate shrinkage of the cement during polymerization. In this study, the crosslinked poly(methylmethacrylate-acrylic acid-allylmethacrylate) modified bone cement was prepared and characterized using tensile analysis and dynamic mechanical analysis. The results show that the modified bone cement is able to enhance the mechanical properties of bone cement. From dynamic mechanical analysis, the transition temperature and the tan δ value of the cement may be affected by prepolymerized crosslinked poly(methylmethacrylate-acrylic acid-allylmethacrylate) powder. From the observation of the fracture surfaces of the cements, the modified bone cement may improve fracture toughness. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3727–3732, 2006