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Topographical profiles – taken via atomic force microscopy – of plain PLLA sheets (A,B) and sheets doped with varying weight percentages of HA or MgO (C-F). Measurements of root mean squared surface roughness indicated that 20% MgO produced the highest roughness at the nanoscale, providing a highly advantageous surface topography for osteoblast proliferation and mineral deposition. Adapted with permission from [139].
