Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (16): 2516-2522.doi: 10.3969/j.issn.2095-4344.1148

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Role of bone status in anterolateral portion of femoral head in the progression of osteonecrosis of the femoral head

Wei Qiushi1, 2, Fang Bin2, Chen Zhenqiu2, He Mincong3, Chen Xiaojun3, Yang Fan3, Zhang Qingwen1, 2, He Wei1, 2   

  1. 1Hip Preserving Ward of Third Department of Orthopedics, 2Third Department of Orthopedics, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510407, Guangdong Province, China; 3Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Online:2019-06-08 Published:2019-06-08
  • Contact: He Wei, Chief physician, Professor, Doctoral supervisor, Hip Preserving Ward of Third Department of Orthopedics, Third Department of Orthopedics, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510407, Guangdong Province, China
  • About author:Wei Qiushi, MD, Hip Preserving Ward of Third Department of Orthopedics, Third Department of Orthopedics, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510407, Guangdong Province, China
  • Supported by:

    国家自然科学基金(81573996),项目负责人:陈振秋|国家自然科学基金(81473697),项目负责人:何伟|广东省科技计划项目(2016A020226028)

Abstract:

BACKGROUND: Mechanical stress plays an important role in the progressive collapse in osteonecrosis of the femoral head. Therefore, the bone structure of weight-bearing area may be the risk factor for collapse.

OBJECTIVE: To investigate the relationship between the bone preservation of weight-bearing area and collapse progression in necrotic femoral head.
METHODS: Eighty-seven patients (102 hips) with ARCO stage II osteonecrosis of the femoral head, diagnosed by MRI, were enrolled. All patients underwent a natural progression. Collapse and bone involvement of the weight-bearing area were viewed by anteroposterior and frog-leg lateral radiographs. According to the location of the necrotic lesion on the anterolateral portion of the femoral head, the necrosis was divided into three types: type 1, the posteromedial and central portions; type 2, part of the anterolateral portion; type 3, the entire anterolateral portion. The collapse rate and the time to collapse in different types were assessed.
RESULTS AND CONCLUSION: (1) All patients were followed up for 3-58 months. (2) Of the 60 hips with collapse, 46 (76.7%) hip collapse was identified on anteroposterior radiograph. On frog-leg lateral radiograph showing collapsed femoral head could be identified in 57 (95.0%) hips, which was significantly different (P < 0.01). (3) In all 102 hips, the collapse rate in type 3 osteonecrosis of the femoral head was significantly higher than that of type 2 osteonecrosis of the femoral head (P < 0.001), and the time to collapse was markedly shortened. None collapse occurred in all six hips with type I osteonecrosis of the femoral head during follow-up. (4) In summary, preservation of anterolateral portion is associated with potential collapse progression in necrotic femoral head.

Key words: osteonecrosis of the femoral head, bone structure, weight-bearing area, collapse, frog-leg lateral radiographs, imaging, bone preservation, the National Natural Science Foundation of China

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