“…Minocycline, the representative kind of tetracyclines, is active against important periodontal pathogens such as A. actinomycetemcomitans ; it also has anti-collagenase properties to reduce tissue destruction and bone resorption (Jusko et al., 2016; Olsen et al., 2017; Pokrowiecki et al., 2017). However, the commercial minocycline oniment (Perio ® , 2% dosage of minocycline ointment) inevitable enhanced the adverse effects including the retardation of bone growth, photosensitivity, permanent discoloration of developing teeth, teratogenesis, as well as hepatic and renal toxicity in susceptible individuals (Abbas et al., 2016). Besides, the generation of bacterial resistance is another major challenge that extremely restricts the benefits of minocycline in controlling infections.…”