Open AccessRelationship between hip joint medial space ratio and collapse of femoral head in non-traumatic osteonecrosis: a retrospective study
Author(s) -
Tianye Lin,
Keda Li,
Weijian Chen,
Peng Yang,
Zhikun Zhuang,
Ying Zhang,
Wei He,
Qingwen Zhang,
Qiushi Wei
Publication year - 2021
Publication title -
journal of hip preservation surgery
Language(s) - English
Resource type - Journals
ISSN - 2054-8397
DOI - 10.1093/jhps/hnab049
Subject(s) - medicine , femoral head , retrospective cohort study , surgery , nuclear medicine
To retrospectively analyze the medial space ratio (MSR) of the hip joint to evaluate its efficacy in predicting osteonecrosis of femoral head (ONFH)-induced collapse and its impacts on the mechanical environment of necrotic femoral head. In this retrospective analysis of traditional Chinese medicine, non-traumatic ONFH (NONFH) patients from January 2008 to December 2013 were selected. The patients were divided into collapse group and non-collapse group based on whether the femoral head collapsed. The anatomical parameters including center–edge (CE) angle, sharp angle, acetabular depth ratio and MSR were evaluated. Receiver operating characteristic curves were estimated to evaluate the sensitivity and specificity of MSR and CE angle in collapse prediction. The results showed that 135 patients (151 hips) were included in this study. The differences in CE angle and MSR between collapse group and non-collapse group were statistically significant. The mean survival time of the hips of patients with MSR <20.35 was greater (P < 0.001) than that of patients with MSR >20.35. The ONFH patients with MSR >20.35 were prone to stress concentration. We could conclude that the hip joint MSR and CE angle strongly correlated with the collapse of NONFH. The specificity of MSR is higher than that of CE angle. When MSR is >20.35, the collapse rate of ONFH will increase significantly.