增材制造的形状变形植入物用于治疗骨缺陷
Vahid Moosabeiki1, Marius A Leeflang1, Jasper G Gerbers2
1Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands.
Acta biomaterialia
|July 7, 2025
概括
形状变化的多孔植入物为关节置换手术中关节缺陷提供了一个新的解决方案. 这些3D打印的植入物符合骨,为复杂的病例提供稳定性和耐用性.
科学领域:
- 整形外科手术 整形外科手术
- 生物材料工程 生物材料工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 在修复全关节整形术 (THA) 中,骨缺陷存在重大挑战.
- 传统的植入物经常与严重的骨损失和不规则的几何形状作斗争,导致不理想的适合和潜在的迁移.
- 需要适应性和强大的解决方案来进行骨重建.
研究的目的:
- 设计,增材制造,并评估形状变形的多孔植入物与动力结构的acetabular缺陷.
- 评估这些新型植入物的解剖学一致性和生物力学性能.
- 为了研究这些植入物适合复杂的acetabular重建在修订THA.
主要方法:
- 使用合成半骨模型建模了三种类型的骨缺陷.
- 形状变形的多孔植入物是增材制造的,并用螺丝和骨固定.
- 使用微型计算机断层扫描 (μCT) 评估了表面合规性,并在准静态和循环负荷下评估了生物力学性能.
主要成果:
- 植入物在所有缺陷类型中都显示出高表面一致性 (与健康的形骨相差10毫米以下).
- 植入物表现出强大的承载能力,故障发生在周围的骨头中,而不是植入物或网状水泥接口.
- 植入物可以承受超过100万次模拟负载周期而不会发生疲劳失效,这表明其耐用性非常好.
结论:
- 形状变化的多孔植入物为复杂的acetabular缺陷提供了一个有希望的解决方案.
- 这些植入物提供了解剖学一致性和机械稳定性,解决了传统移植的局限性.
- 需要进一步的尸体和临床研究来验证它们在临床环境中的有效性.
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