Zhang Ying, Tian Kewei, Ma Xianghao, Zhang Leilei, Sun Ruibo, Wang Huichao, Liu Youwen, Zhou Guangquan
1 Luoyang Orthopedic-Traumatological Hospital, Henan, China.
2 The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China.
J Int Med Res. 2018 Feb;46(2):693-698. doi: 10.1177/0300060517719625. Epub 2017 Sep 6.
Objective This study aimed to investigate the damage pattern of the stress transfer path (STP) for the Japanese Investigation Committee (JIC) classification of pre-collapse osteonecrosis of the femoral head. We aimed to provide a specific biomechanical basis for treatment decisions of each subtype. Methods Five computational models were used in the experiment. Different necrotic classifications were simulated based on the JIC classification system. Damage patterns of the STP were used for qualitative assessment and average stresses were used for quantitative analysis. Results The STP of type A showed a strong similarity to the healthy level, which was consistent with the bone density distribution in X-rays and previous simulations results. The damaged area of principal stress of type B was approximately 25% of the healthy level. The STPs of types C1 and C2 were broken and the damaged areas of principal stress were more than 50% of the healthy level. The efficiency of stress transfer was reduced. Conclusions These results indicate that the damage patterns and stress transfer efficiency of the femoral head are associated with necrotic classifications.
目的 本研究旨在探讨日本调查委员会（JIC）对股骨头塌陷前骨坏死分类中应力传递路径（STP）的损伤模式。我们旨在为各亚型的治疗决策提供具体的生物力学依据。方法 实验采用了五个计算模型。基于JIC分类系统模拟了不同的坏死分类。STP的损伤模式用于定性评估，平均应力用于定量分析。结果 A型的STP与健康水平高度相似，这与X线片上的骨密度分布及先前的模拟结果一致。B型主应力损伤面积约为健康水平的25%。C1型和C2型的STP断裂，主应力损伤面积超过健康水平的50%。应力传递效率降低。结论 这些结果表明，股骨头的损伤模式和应力传递效率与坏死分类相关。
