Thermophysical properties and material modelling of acrylic bone cements used in vertebroplasty
Thermophysical properties and material modelling of acrylic bone cements used in vertebroplasty
复制标题
椎体成形术用丙烯酸骨水泥的热物理特性和材料建模
DOI：
10.1007/s10973-011-1508-7
复制
发表时间：
2011
影响因子：
4.4
通讯作者：
J. Ihlemann
中科院分区：
文献类型：
--
作者：
S. Kolmeder;A. Lion;R. Landgraf;J. Ihlemann
用丙烯酸骨水泥固定椎体，称为椎体成形术，是现代外科的常见手术。然而，固化骨水泥的热机械-化学耦合材料行为使得即使是经验丰富的外科医生也难以应用，并可能导致潜在的并发症，如热坏死、骨水泥泄漏、栓塞和术后负荷转移。为了减少这些潜在的并发症，以最大限度地降低风险，并更好地了解发生的影响，商业丙烯酸骨水泥的热物理性能进行了详细研究，使用差示扫描量热法，体积流变仪和温度控制流变仪。更具体地说，在骨水泥的反应过程中的反应动力学，比热，热导率，热膨胀，化学收缩以及机械行为进行了研究。此外，探索的材料行为是由一个定制的材料模型，考虑到所有观察到的效果。借助于该模型，可以通过有限元处理来研究丙烯酸骨水泥的应用和固化过程中出现的不均匀的化学、热和机械状态。
The stabilization of osteoporotic vertebrae with acrylic bone cement, called vertebroplasty, is a common procedure in modern surgery. However, the thermomechanical-chemically coupled material behaviour of curing bone cements makes the application even for experienced surgeons difficult and can lead to potential complications like heat necrosis, leaking bone cement, embolisms and postoperative load shifting. In order to reduce these potential complications, to minimize the risks and to better understand the occurring effects, the thermophysical properties of a commercial acrylic bone cement were investigated in detail using differential scanning calorimetry, volumetric dilatometry and temperature controlled rheometry. More specifically, the reaction kinetics, the specific heat, the thermal conductivity, the thermal expansion, the chemical shrinkage as well as the mechanical behaviour was studied during the reaction process of the bone cement. Furthermore, the explored material behaviour is described by a customized material model that takes into account all observed effects. With the aid of this model the inhomogeneous chemical, thermal and mechanical states that appear during the application and curing of acrylic bone cements, can be studied by finite element treatment.