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首页> 外文会议>International Conference on Stress Evaluation Using Neutrons and Synchrotron Radiation; 20070924-26; Vienna(AT) >Neutron diffraction study of a new generation of implants
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Neutron diffraction study of a new generation of implants

机译：新一代植入物的中子衍射研究

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摘要

In recent years, nanostructured coatings by Plasma Thermal Spraying (PTS) attracted intense interest due to their enhanced mechanical properties as hardness, strength and ductility. The aim of this study was to evaluate the influence of coating the implant by nano-hydroxyaptite, n-HAp, Ca_(10) (PO_4)_6(OH)_2. The results obtained with n-HAp will also compared with the implant coated with HAp. Bone is a composite material in which are associated a mineral phase in the form of crystals of HAp and an organic matrix constituted by collagen. The c-axes of HAp and the collagen fibers are preferentially oriented in the direction of the stresses that the bones need to withstand. At the interface implant-bone, the new bone reconstituted after implantation must have the same proprieties of the original bone in order to have good fixation with the implant. Therefore, it is necessary to study the mechanical properties of this new bone crystals reconstituted at the interface with the implants coated with n-HAp and HAp by neutrons diffraction on D20 at ILL.
机译：近年来，通过等离子热喷涂（PTS）形成的纳米结构涂层引起了人们极大的兴趣，因为它们具有增强的机械性能，例如硬度，强度和延展性。这项研究的目的是评估纳米羟基磷灰石，n-HAp，Ca_（10）（PO_4）_6（OH）_2覆盖植入物的影响。用n-HAp获得的结果还将与用HAp包被的植入物进行比较。骨是一种复合材料，其中的HAp晶体形式的矿物质相与由胶原蛋白构成的有机基质相关。 HAp的c轴和胶原纤维优先沿骨骼需要承受的应力方向定向。在植入物骨骼的界面处，植入后重建的新骨骼必须具有与原始骨骼相同的属性，以便与植入物良好地固定。因此，有必要通过ILL在D20上的中子衍射研究在与涂有n-HAp和HAp的植入物的界面处重构的这种新骨晶体的机械性能。

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