Impact of Postoperative Reduction Quality on Biomechanics of the Femoral Head Following Internal Fixation of Femoral Neck Fractures
10.16156/j.1004-7220.2025.05.008
- VernacularTitle:股骨颈骨折内固定术后复位质量对股骨头生物力学的影响
- Author:
Shixiong ZHANG
1
;
Jianxiong MA
;
Bin LU
;
Ying WANG
;
Aixian TIAN
;
Lei SUN
;
Zhe HAN
;
Jiahui CHEN
;
Jing DAI
;
Haohao BAI
;
Hongzhen JIN
;
Jie ZHAO
;
Pengfei LI
;
Xinlong MA
Author Information
1. 天津医科大学骨科临床学院,天津 300070;天津大学天津医院(天津市天津医院),天津 300211;天津市骨科研究所,天津 300050
- Publication Type:Journal Article
- Keywords:
osteonecrosis of the femoral head;
reduction quality;
trabecular bone;
biomechanics
- From:
Journal of Medical Biomechanics
2025;40(5):1144-1149
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of postoperative reduction quality in femoral neck fracture internal fixation on mechanical properties of the femoral head from the perspective of trabecular bone biomechanics.Methods From patients who underwent hip replacement surgery for femoral neck fractures,a total of 26 femoral head slice specimens were obtained.The central axis of the primary compressive trabeculae was defined as the 0° group,with the intersection point of the primary compressive trabeculae and the femoral calcar serving as the center.By rotating the specimens to simulate different reduction angles,the cut femoral head slice specimens were randomly divided into five groups:-10°,-5°,0°,5°,and 10°,representing femoral heads with varying reduction qualities.The specimens were subjected to single compression load tests and fatigue load tests.The load was set from 70 N to 1 400 N,at a frequency of 1 Hz,with 10 000 cycles.Axial stiffness,displacement,and the number of collapse cycles were measured,to compare the biomechanical properties of femoral head specimens under different reduction qualities.Results There were differences in the axial stiffness,displacement,and number of collapse cycles among the femoral head specimens in different groups.Under 800 N load,the axial stiffness of 0° group was significantly greater than that of±10° groups(P＜0.05).The axial stiffness of 0° group was also greater than that of the±5° groups,but the differences were not statistically significant(P＞0.05).The axial stiffness of±5° groups was greater than that of±10° groups(P＜0.05).0° group had a lower displacement than±5° groups and±10° groups.However,the differences in displacement between 0° group and±5° groups were not statistically significant(P＞0.05),while the differences between the 0° group and±10° groups were statistically significant(P＜0.05).The differences in displacement between±5° groups and±10° groups were also statistically significant(P＜0.05).0° group had a significantly higher number of collapse cycles than±10° groups(P＜0.05).The number of collapse cycles in 0° group was also higher than that in±5° groups,but the differences were not statistically significant(P＞0.05).The number of collapse cycles in±5° groups was significantly higher than that±10° groups(P＜0.05).Conclusions The quality of reduction after internal fixation of femoral neck fractures significantly affects the biomechanical properties of the femoral head.This study provides a scientific basis for optimizing treatment and postoperative management,aiming to improve clinical outcomes and patients' quality of life.
