Cover Image, Volume 8, Issue4

Scanning electron micrographs showing Bioglass 45S5 particles at various time points of immersion in conventional Tris‐HCl buffer (left) or in chloride‐free Tris‐acetic acid buffer (right). Particles are partially covered in layers of apatite needles (“A”), while selected areas without these needles are labelled “N”. In some images long calcite rods (white arrows) are also present. image