Figure 1.. Schematic illustration of our study design. Methacrylated hyaluronic acid (MeHA) was synthesised and used with incorporated virus particles as a hydrogel structural platform to fill skull defects in osteoporotic and normal Sprague-Dawley rats. The RGD mutant TMV graphic was generated from PyMol with coordinates 2TMV from the Protein Data Bank (www.rcsb.org) and created with BioRender.com. OVX: ovariectomised; RGD: arginyl-glycyl-aspartic acid; TMV: tobacco mosaic virus.