Wang Hong, Zhang Kangrui, Niu Wenduo, Min Sicong, Lu Fan, Zhang Shifeng, Gao Wensheng, Han Hua, Xia Yayi
Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, China.
Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, Gansu, 730000, China.
J Orthop Surg Res. 2025 Mar 6;20(1):245. doi: 10.1186/s13018-025-05626-1.
Bone cement is a research hotspot and has been partially applied in the field of bone repair thanks to the good mechanical, physical and antibacterial properties. However, the easy wear and high temperature during curing characteristics would cause surrounding tissue necrosis, which seriously limits the wider application to some extent. In this work, the hexagonal boron nitride (h-BN) nano flakes were optimized to enhance the bone cement matrix (PMMA) via mechanical doping. The doping of h-BN into PMMA results in an improved mechanical (bending stress increased by 26%), thermal-conductivity (increased by 175% with the loading of 20 wt%), wear-resistance properties, in addition, the h-BN has no significant impact on cell activity. What's more, the co-modification of PMMA with h-BN and Vancomycin (Va) endows the bone cement composites with more persistent drug release characteristics. This comprehensive performance evolution evaluation provides a reference for the innovative application of modified bone cement.
骨水泥是一个研究热点,由于其良好的力学、物理和抗菌性能,已在骨修复领域得到部分应用。然而,固化过程中易磨损和高温的特性会导致周围组织坏死,这在一定程度上严重限制了其更广泛的应用。在这项工作中,通过机械掺杂对六方氮化硼(h-BN)纳米片进行了优化,以增强骨水泥基体(PMMA)。将h-BN掺杂到PMMA中可改善其力学性能(弯曲应力提高26%)、热导率(20 wt%负载时提高175%)和耐磨性能,此外,h-BN对细胞活性没有显著影响。更重要的是,h-BN与万古霉素(Va)对PMMA进行共改性,赋予骨水泥复合材料更持久的药物释放特性。这种综合性能演变评估为改性骨水泥的创新应用提供了参考。