Limitations and next plan of this study
Several limitations were identified in this study. Firstly, the sample size of 36 patients was relatively small and may not have provided sufficient statistical power. Secondly, although local pneumatization has been reported in the literature as a potential risk of magnesium screw implantation, we did not observe this phenomenon in our study, likely due to the short 6-month follow-up period. Thirdly, the presence of unilateral and bilateral hip lesions in Group A, B and C was not considered as a variable in the controlled trial, and its potential impact on study outcomes was not assessed. Fourth, the current method of semi-quantitative analysis of blood supply to the femoral head utilizing DCE-MRI may be susceptible to factors such as hemodynamics and vascular permeability, and may be influenced by parameter settings.In future studies, we plan to conduct a longer follow-up and include a larger, more diverse patient population. We will also perform more quantitative analyses to more precisely evaluate the effect of magnesium screws on promoting angiogenesis.