Abstract: The present invention relates to a bioactive glass having the composition of SiO2 44-65 wt-% of the final total weight, Na2O 5-26 wt-% of the final total weight, CaO 10-25 wt-% of the final total weight, K2O 0-1 5 wt-% of the final total weight, MgO 0-6 wt-% of the final total weight, B2O3 0-4 wt-% of the final total weight, and P2O5 0-7 wt-% of the final total weight, for use in the long- and short-term prevention and/or treatment of conditions relating to or caused by bone infections, provided that the total amount of Na2O and K2O is 10-30 wt-% of the final total weight, and that any source of oxygen capable of releasing oxygen in the form of molecular oxygen or reactive oxygen species, is absent.