A self-film-forming composition in powder form, a reconstituted formula and a kit for oral use are provided, which allow an adequate colonization of the probiotic in the oral cavities together with a sufficient residence time to allow beneficial effects against the pathogens related with oral conditions. Thus, the items provided are useful for the the prevention and/or treatment of a condition related to alterations of the oral microbiota, and specifically for peri-implantitis. The self-film-forming composition in powder form comprises at least a gelifier agent and/or at least a bioadhesive agent, and at least one lactic acid bacteria strain.
