Representable scanned hemalaun eozin histology images of GBR performance study on beagles. Dotted Line = edges of the defect site where the screw was implanted; asterisks (*) = particles of new bone around screws. Black Ars = magnesium screw; (a), (b), (c) and (d) are present the magnesium screw where we can see that is degrading/reabsorbing over time. At 52 weeks (d), the magnesium screw is completely absorbed and replaced by the formation of new bone. White Ars = titanium screw; (e–h) present the titanium screw at all time points 1 week (e), 8 weeks (f), 16 weeks (g) and 52 weeks (h). In each image, the scale bar represents 0,25 mm.