Scheme 1
![Scheme 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12951-024-02483-8/MediaObjects/12951_2024_2483_Sch1_HTML.png)
CGP preparation schematic and synergistic PDT/NO antibacterial effect. Schematic representation of CGP preparation, accompanied by an elucidation of the mechanisms underlying the highly efficient synergistic antibacterial action of PDT/NO and its role in promoting apical periodontitis healing