用各种密度测试块对增强脚螺丝的水泥体积和填充模式的生物力学影响
Ming-Kai Hsieh1, Weng-Pin Chen2, De-Mei Lee3
1Department of Orthopaedic Surgery, Spine Section, Bone and Joint Research Center, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan.
概括
用聚甲基甲酸盐 (PMMA) 骨增强脚螺丝可以增加骨的稳定性,特别是在骨质疏松性骨中. 周围的水泥云模式比尖端云更有效地增强了螺丝 anchorage.
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
- 骨生理学 骨生理学
背景情况:
- 骨质疏松症增加了脚螺丝松动的风险.
- 聚甲基甲酸 (PMMA) 骨用于增强骨.
- 最佳的水泥量和填充模式仍在争论中.
研究的目的:
- 为了澄清水泥体积和填充模式对脚螺杆稳定性的影响.
- 为了研究不同密度的合成骨块中的螺丝稳定性.
主要方法:
- 经过测试的合成骨块 (7.5,15,30 pcf),模拟不同的骨密度.
- 评估的水泥量 (2,3,4 cc) 和两个填充模式 (尖端与周围的云).
- 使用一台Instron测试机器测量固体和头螺丝的拉力.
主要成果:
- 增加的水泥容量显著提高了所有骨密度的拉力强度.
- 水泥增强大大提高了骨质疏松性骨的拔起强度.
- 周围的水泥云模式提供了比尖端水泥云模式更大的定力.
结论:
- 虽然更多的水泥增加了拉出强度,但在骨质疏松性骨中,过度增强是不必要的.
- 填充模式 (周围的云) 对于提高螺丝稳定性至关重要.
- 螺丝设计的稳定性不如水泥填充模式那么重要.
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