Micro-CT analyses of specimens were conducted as previously described [18 (link)]. Before micro-CT analyses, the skull specimens were collected and fixed in 4% paraformaldehyde for 1 day. Then. micro-CT images were obtained from high-resolution Inveon micro-CT (Siemens, Munich, Germany) with a resolution of 8.99 μm at 80 kV, 500 μA and an exposure time of 1500 ms. All specimens were scanned using the uniform parameters in the same container. Multimodal three-dimensional (3D) visualization software (Inveon Research Workplace; Siemens, Munich, Germany) was used to reconstruct 3D images. Bone volume (BV) and bone volume/tissue volume (BV/TV) were calculated.
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