螺丝角度和多重插入对多轴锁定系统负载到故障的影响
Jakub Glowacki1, Tomasz Bartkowiak2, Piotr Paczos3
1Department of General Orthopaedics, Musculoskeletal Oncology and Trauma Surgery, Poznan University of Medical Sciences, Poznań, Poland.
多轴锁定螺丝提供了外科手术的灵活性,但离轴和多重插入大大降低了固定强度. 外科医生应该尽量减少插入角度,以实现最佳的骨折固定.
科学领域:
- 骨科生物力学 骨科生物力学
- 手术植入物技术的使用.
背景情况:
- 多轴锁定板对于断裂固定至关重要,特别是在复杂的情况下.
- 优化螺丝定位是植入物性能和患者结果的关键.
研究的目的:
- 为了评估 ChM 5.0 ChLP 多轴螺丝的机械性能.
- 为了评估离轴和多重插入对螺丝固定的影响.
- 为了将线程与机械性能相关联.
主要方法:
- 多轴螺丝被插入在不同的角度 (0°,10°,15°,-15°).
- 多重插入涉及在同一孔中连续的角度放置.
- 在破坏性机械测试之前,微CT和扫描电子显微镜分析了螺丝板接口.
主要成果:
- 0°插入产生了最高的曲强度.
- 离轴插入 (10°,15°) 可将负载至故障降低高达55%.
- 多次-15°插入将力容量降低高达70%,具有很高的可变性.
结论:
- ChM 5.0 ChLP 系统提供了外科多功能性.
- 离轴和重复的螺丝插入会损害固定强度.
- 建议将插入角度最小化,以提高骨折稳定性.
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