Report: Discussion on the development of nano Ag/TiO2 coating bracket and its antibacterial property and biocompatibility in orthodontic treatment

This paper aims to explore the antibacterial property of nano ag/tio2 coating bracket for the common bacteria in oral cavity,and discuss its biocompatibility. micro morphology in the surface of nano ag/tio2 coating bracket was detected by scanning electron microscope (sem),and surface roughness of ordinary mental bracket,nano tio2 coating bracket and nano ag/tio2 coating bracket were measured. first,antibacterial property of nano ag/tio2 coating bracket on the common bacteria in oral cavity was studied by sticking membrane method. secondly,bonding strength of nano tio2 coating and nano ag/tio2 coating bracket in groups were detected by scratching test. the result showed that,the synthetic nano ag/tio2 coating was nanogranular films with rigorous organizational structure,presenting as smooth and clean surface,and antibacterial rate of nano ag/tio2 coating for the common bacteria in oral cavity for 20 min was more than 79% in the dark. all the findings suggested that,nano ag/tio2 coating bracket not only has antibacterial effect but also has good biocompatibility,therefore,it can satisfy the clinical request of orthodontic treatment.