Preparation and characteristics of a novel oxygen-releasing coating for improved cell responses in hypoxic...

Affected by environmental factors such as oxygen deficiency, the secretion of growth factor was abnormal in bone injury sites, resulting in the poor responses of osteoblasts and prolonging the healing process. Herein, in this study, we reported an in situ oxygen-releasing porous titanium coating that combines the dual degradability of poly(lactic-co-glycolic acid) with the self-releasing oxygen capacity of the CaO₂ core. The resulting formulation exhibited stable oxygen-releasing capacity as well as the ability to promote proliferation and differentiation of the MC3T3 cell line under hypoxia conditions. According to these results, oxygen-releasing coatings based on improved cellular microenvironment may be a promising bone repair material that would reduce the incidence of difficult bone healing in the future.