中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (9): 1323-1328.doi: 10.12307/2022.422

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

股骨头坏死血运重建与内部微观结构改变的关系

李  获1,王  鹏1,高健明2,蒋浩然2,鲁晓波1,彭  江2   

  1. 1西南医科大学附属医院骨与关节外科,四川省泸州市   646000;2中国人民解放军总医院骨科研究所,骨科再生医学北京市重点实验室,全军骨科战创伤重点实验室,北京市   100853
  • 收稿日期:2021-04-02 修回日期:2021-04-08 接受日期:2021-05-12 出版日期:2022-03-28 发布日期:2021-12-09
  • 通讯作者: 彭江,博士,研究员,中国人民解放军总医院骨科研究所,骨科再生医学北京市重点实验室,全军骨科战创伤重点实验室,北京市 100853 鲁晓波,教授,主任医师,西南医科大学附属医院骨与关节外科,四川省泸州市 6460005
  • 作者简介:李获,男,1994年生,四川省自贡市人,汉族,西南医科大学在读硕士,主要从股骨头坏死方面的研究。
  • 基金资助:
    国家自然科学基金(81972047),项目负责人:彭江

Relationship between revascularization and internal microstructure changes in osteonecrosis of the femoral head

Li Huo1, Wang Peng1, Gao Jianming2, Jiang Haoran2, Lu Xiaobo1, Peng Jiang2   

  1. 1Department of Bone and Joint Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Institute of Orthopedics, General Hospital of Chinese People’s Liberation Army, Beijing Key Laboratory of Orthopedic Regenerative Medicine, Key Laboratory of Orthopedic War Trauma of the Whole Army, Beijing 100853, China
  • Received:2021-04-02 Revised:2021-04-08 Accepted:2021-05-12 Online:2022-03-28 Published:2021-12-09
  • Contact: Peng Jiang, MD, Researcher, Institute of Orthopedics, General Hospital of Chinese People’s Liberation Army, Beijing Key Laboratory of Orthopedic Regenerative Medicine, Key Laboratory of Orthopedic War Trauma of the Whole Army, Beijing 100853, China Lu Xiaobo, Professor, Chief physician, Department of Bone and Joint Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Li Huo, Master candidate, Department of Bone and Joint Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81972047 (to PJ)

摘要:

文题释义:
动态增强磁共振成像:可通过获取增强前的基线图像及静脉注射钆对比剂后连续多期的高时间分辨率的图像,计算随时间变化的MRI信号强度,来反映感兴趣区组织中对比剂的动态增强特性,其不仅能评估组织的血流情况,还能提供多个微循环的参数来量化反映组织的病理生理过程。

背景:股骨头坏死的病理特点之一是股骨头血运受损,随后导致骨坏死、股骨头内微骨折的发生。股骨头坏死确切的病理生理机制尚不完全清楚,但普遍认为与骨内循环中断和最终骨组织死亡紧密相关。股骨头坏死主要包括缺血的发生以及随后启动的修复过程,但很少有文献对其发生发展过程中两者之间的关系进行探索。
目的:使用动态增强MRI分析股骨头坏死修复过程中血流灌注的变化情况,从而明确股骨头坏死修复反应过程中血流灌注变化规律及内部骨微观结构变化之间的关系。
方法:采用动态增强MRI技术,对每名受试者进行动态MRI扫描,在股骨头坏死患者的坏死区、修复反应区和正常区(股骨颈或大转子)画出感兴趣区。对于每个感兴趣区,得到相应的对比剂浓度,并计算对应曲线半定量参数(峰值强度、达峰时间、曲线下面积、初始斜率等)。使用origin软件进行数据处理,分别获得股骨头坏死患者感兴趣区的对比剂数据,同时将对比剂统计结果与相应病理结果相对比,探究不同分期股骨头坏死内部结构的变化规律。
结果与结论:①对比剂结果显示,股骨头坏死修复反应区对比剂浓度较其他区域明显增加(P < 0.05);②造影浓度变化曲线结果表明,修复反应区峰值、曲线下面积以及斜率都较其他区域明显增加(P < 0.05),且随着疾病的进展以及塌陷的发生,这一差距更加明显;③组织学分析表明,塌陷前修复反应区骨小梁结构连续性尚可,随着塌陷的发生,骨小梁吸收增加,且周围存在大量纤维肉芽组织和新生血管;④提示股骨头坏死修复反应区血流灌注较其他区域明显增加,随着塌陷的发生,修复反应区血流灌注增加更加明显;修复反应区血流灌注的增加,加速了这一区域骨小梁的吸收,这和股骨头坏死塌陷的发生有着重要的相关性。

https://orcid.org/0000-0002-0470-9290 (李获) 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 股骨头坏死, 动态增强MRI, 骨小梁结构, 病理, 修复反应, 新生血管

Abstract: BACKGROUND: One of the pathological features of osteonecrosis of the femoral head is damage to the blood circulation of the femoral head, which leads to osteonecrosis and microfracture of the femoral head. The exact pathophysiological mechanism is not completely clear, but it is generally believed that it is closely related to interruption of the intraosseous circulation and death of the bone tissue. Osteonecrosis of the femoral head mainly includes ischemia and the subsequent repair process. However, few studies have explored the relationship between ischemia and repair in occurrence and development of osteonecrosis of the femoral head.  
OBJECTIVE: To analyze changes in blood perfusion during the repair of osteonecrosis of the femoral head through dynamic contrast enhanced-MRI and thereby to clarify the changes in blood perfusion and the corresponding internal microstructure during osteonecrosis of the femoral head repair.
METHODS:  Dynamic contrast enhanced-MRI technique was used to scan each subject. Region of interest was drawn in the necrotic area, repair reaction area and normal area (femoral neck or greater trochanter) of osteonecrosis of the femoral head patients. For each region of interest, we got the corresponding contrast medium concentration, and calculated the semi-quantitative parameters of the corresponding curve (peak intensity, peak time, area under the curve, and initial slope). The “origin” software was used for data processing, the contrast media data of the region of interest of patients with osteonecrosis of the femoral head was obtained, and the statistical results of the contrast medium were compared with the results of optical microscope on the corresponding decalcified sections to explore the changes of the internal structure of osteonecrosis of the femoral head in different stages.  
RESULTS AND CONCLUSION: (1) The statistical analysis showed that the average concentration of contrast medium in the repair reaction area of osteonecrosis of the femoral head was significantly higher than that in other areas (P < 0.05). (2) The statistical analysis showed that the maximum peak intensity value, area under the curve and initial slope of curve of concentration of contrast medium were significantly higher than those in other areas (P < 0.05). With the progression of the disease and the occurrence of collapse, this gap was more obvious. (3) Histological analysis showed that the bone trabecular structure in the reparative reaction area was continuous before collapse. With the occurrence of collapse, trabecular absorption increased, surrounded by a large amount of fibrous granulation tissue and neovascularization. (4) The results showed that the blood perfusion in the repair reaction area of osteonecrosis of the femoral head is significantly higher than that in other areas, and the increase in blood perfusion in the repair reaction area becomes more obvious with the occurrence of collapse. The increase in blood perfusion in the repair reaction area accelerates trabecular absorption in this area, which is closely related to the occurrence of osteonecrosis and collapse of the femoral head.

Key words: osteonecrosis of the femoral head, dynamic contrast enhanced MRI, trabecular microstructure, pathology, reparative reaction, neovascularization

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