Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany.
Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany.
Int J Mol Sci. 2021 Dec 29;23(1):374. doi: 10.3390/ijms23010374.
Osseointegration is a prerequisite for the long-term success of implants. Titanium implants are preferred for their biocompatibility and mechanical properties. Nonetheless, the need for early and immediate loading requires enhancing these properties by adding bioactive coatings. In this preclinical study, extracellular matrix properties and cellular balance at the implant/bone interface was examined. Polyelectrolyte multilayers of chitosan and gelatin or with chitosan and Hyaluronic acid fabricated on titanium alloy using a layer-by-layer self-assembly process were compared with native titanium alloy. The study aimed to histologically evaluate bone parameters that correlate to the biomechanical anchorage enhancement resulted from bioactive coatings of titanium implants in a rat animal model. Superior collagen fiber arrangements and an increased number of active osteocytes reflected a significant improvement of bone matrix quality at the bone interface of the chitosan/gelatin-coated titan implants over chitosan/hyaluronic acid-coated and native implants. Furthermore, the numbers and localization of osteoblasts and osteoclasts in the reparative and remodeling phases suggested a better cellular balance in the chitosan/Gel-coated group over the other two groups. Investigating the micro-mechanical properties of bone tissue at the interface can elucidate detailed discrepancies between different promising bioactive coatings of titanium alloys to maximize their benefit in future medical applications.
骨整合是种植体长期成功的前提。钛种植体因其生物相容性和机械性能而被首选。然而,早期和即刻负载的需求需要通过添加生物活性涂层来增强这些特性。在这项临床前研究中,研究了植入物/骨界面处的细胞外基质特性和细胞平衡。使用层层自组装工艺在钛合金上制备了壳聚糖和明胶或壳聚糖和透明质酸的聚电解质多层膜,并与天然钛合金进行了比较。该研究旨在通过在大鼠动物模型中评估与生物活性涂层增强钛植入物的生物力学锚固相关的骨参数,从组织学上评估骨参数。壳聚糖/明胶涂层钛植入物的骨界面处的胶原纤维排列更好,活性骨细胞数量增加,这表明骨基质质量得到了显著改善,而壳聚糖/透明质酸涂层和天然植入物的骨基质质量则较差。此外,修复和重塑阶段成骨细胞和破骨细胞的数量和定位表明,壳聚糖/Gel 涂层组的细胞平衡更好。研究骨组织在界面处的微机械性能可以阐明不同有前途的钛合金生物活性涂层之间的详细差异,以最大限度地提高它们在未来医学应用中的益处。