Fig. 1

The process of wall thickness analysis of the unhealed bone group. Analysis process of the bone healing group: The model of femoral bone healing in dogs was established 24 weeks later, and the healthy side and the affected side were modeled. a Beagle anterograde radiographs of femur, b Beagle lateral radiographs of femur, c Physical photographs of the femoral internal fixator were taken out. d Three-dimensional modeling was conducted on the healthy side and the affected side using CT data to obtain CT mean value, volume, and other data. Analyze the thickness of the affected lateral wall to understand the maximum and median values. f Analyze the healthy lateral wall thickness to know the maximum and median. After 24 weeks, the healthy side and the affected side were modeled and analyzed by wall thickness ratio analysis, Micro-PET/CT, and mechanical test machine. It was found that the wall thickness ratio method was equal to that of the other two groups, and the femoral bone was not healed