三枚中空螺纹加压钉+髂骨块植骨治疗股骨颈骨折的生物力学研究与临床应用

BIOMECHANICAL STUDY AND CLINICAL APPLICATION OF CURING FEMORAL NECK FRACTURE WITH 3 HOLLOW COMPRESSION SCREWS+PLANTING A PIECE OF ILIUM

目的：对作者设计的三枚中空螺纹加压钉＋骼骨块植骨（ＨＳＩ）治疗股骨颈（头下型）骨折，进行生物力学分析，为临床应用提供科学依据。方法：利用新鲜尸股骨标本进行实验应力分析，比较三枚中空螺纹加压钉＋骼骨块植骨与单纯应用三枚中空螺纹加压钉固定（ＨＳ）比较，观察两者在内固定上的生物力学性能指标变化。结果：实验结果表明采用螺纹钉＋骼骨植骨固定（ＨＳＩ）与单纯采用螺纹钉固定（ＨＳ）治疗股骨颈（头下型）骨折，其生物力学性能无显著性差异。临床１３例实践证明，采用螺纹钉＋骼骨植骨治疗头下型股骨颈骨折，近期内未见股骨头坏死发生。结论：采用三枚中空加压螺纹钉＋骼骨植骨术式符合生物力学模型，是治疗股骨颈（头下型）骨折一种有效的新方法。

Objective: In order to provide the scientific bias for clinical application, We analysed the biomechanic of self-designed 3 hollow compression screws+planting a piece of ilium (HSI) on femoral neck fracture (under the head). Method: Through experimental stress analysis on fresh cadaver femoral samples. Cure femoral neck fracture (under the head) with 3 hollow compression screws+planting a piece of ilium(HSI), compare this method with that by using 3 hollow compression screws only (HS) and observe the differences in biomechanical performance between these two internal fixation methods. Results Experimental results showed that there is no obvious difference in biomechanical performance between HSI method and HS method. 13 clinical practices have proved that to cure femoral neck fracture by using HSI method will not result femoral head necrosis(at least it has not happened yet). Conclusion To cure femoral neck fracture(under the head) by using HSI method is a very effective new method.