Advancing biophysical measurements to provide a better understanding of peri-implant inflammation and to inform materials development.

金属生物材料被用作常规医疗保健的一部分，用于替换或修复丢失或受损的组织，但目前使用的材料经常与不良的生物反应有关。这些事件要么与感染有关，要么与植入物衍生物（金属表面、颗粒、离子和金属修饰的生物分子）或两者的生物反应有关。一个关键的缺陷是我们对失败植入物周围的物理化学环境的理解。虽然有许多工业和学术主导的项目旨在开发新的合金和表面，但我们对植入金属衍生物在组织中的形式以及它们与细胞和生物途径相互作用的理解仍然不足。******我们采取的方法是，要真正了解如何开发下一代金属生物材料，我们必须能够了解它们的行为，而不仅仅是在1、2或3年后，而是在几十年后。为了实现这一目标，我们之前的工作强调了一些属于NSERC职权范围内的技术发展领域。在这项发现资助的过程中，我们的目标是：******首先，开发新的相关同步辐射- x射线荧光(SR-XRF)/ x射线吸收光谱（XAS）成像方案。对组织和细胞群的二维SR-XRF测量已经很好地建立，但数据很少与潜在的组织组成相关。样品畸变使分析变得复杂，在元素分布不均匀的情况下（如种植体周围组织）分析更为复杂。利用镧系元素的L-III能边接近常见生物医学合金元素（Co, Cr）的k边激发能，更能代表器件的长期性能。与正在开发新型合金的外部合作伙伴合作，包括ti基大块金属玻璃（参见- ccv H2020-MSCA-IF-GLASSIX），我们将在使用一组已建立的分析方法进行生物相容性测试之前，模拟生物腐蚀和机械辅助腐蚀行为（有前途的成分）。这些传统的“生物测定”将由SR-XAS测量补充，以验证暴露并监测植入物衍生产品物种形成的后续细胞介导修饰。

Metallic biomaterials are used as part of routine healthcare to replace or repair lost or damaged tissues but the currently used materials are frequently associated with adverse biological responses. These events are linked to either infection or to biological responses to implant derivatives (metal surfaces, particles, ions, and metal modified bio-molecules) or a combination. A key deficiency is our understanding of the physico-chemical environment which develops around the failing implant. Whilst there are numerous industrial and academic led programs aiming to develop new alloys and surfaces we still have an inadequate understanding of the form implant metal derivatives are found in tissues and with which cells and biological pathways they interact. ******We take the approach that to really understand how to develop the next generation of metallic biomaterials we must be able to understand how they behave, not just after 1, 2 or 3 years, but after several decades. To achieve this, our previous work has highlighted a number of areas where technological developments falling within the NSERC remit will be required. Over the course of this discovery grant we aim to:******Firstly, develop novel correlative synchrotron radiation-X-Ray fluorescence (SR-XRF)/ X-ray absorption spectroscopic (XAS) imaging protocols. 2D SR-XRF measurements on tissues and on cell populations are well established but data is infrequently correlated with the underlying tissue composition. Analysis is complicated by sample distortion and is most complicated where heterogeneous elemental distributions exist (such as peri-implant tissues). Taking advantage of the fact that L-III energy edges of Lanthanides lie close to the k-edge excitation energies of common biomedical alloy elements (Co, Cr, more representative of long-term device performance. Working with external established collaborative partners who are developing novel alloys including Ti-based bulk metallic glasses (see-CCV H2020-MSCA-IF-GLASSIX) we will simulate biocorrosion and mechanically assisted corrosion behavior (of promising compositions) prior to biological compatibility testing using a panel of established assays. These conventional' biological assays will be complemented by SR-XAS measurements to validate exposures and monitor subsequent cellular mediated modifications to the speciation of the implant derived products.