PROBLEM TO BE SOLVED: To provide a method for inhibiting dental caries safer and more effective than before by controlling the formation of a biofilm formed by germs causing dental caries, not by controlling germs causing dental caries, since by the method for inhibiting dental caries using a conventional antimicrobial agent, an enzyme inhibitor or an antibiotic, a polysaccharide outside of cells hinders the penetration of an antimicrobial agent, an enzyme inhibitor, an antibiotic and the like, the desired effect for inhibiting dental caries is difficult to obtain and the use of the antimicrobial agent and the like gives a high risk of appearance of resistant bacteria, therefore is not preferable.SOLUTION: In a composition, a substance which controls quorum sensing of Streptococcus mutans controlled by CSP is incorporated. The formation of a cavity biofilm is hindered by the composition which controls quorum sensing.COPYRIGHT: (C)2012,JPO&INPIT【課題】従来からある抗菌剤、酵素阻害剤又は抗生物質を用いたう蝕抑制法では、口腔バイオフィルムの菌体外多糖が抗菌剤、酵素阻害剤、抗生物質等の浸透を妨げるため、狙ったとおりのう蝕抑制効果を出すことが困難である。また、抗菌剤等の使用は耐性菌が出現する危険性が高いため、好ましくない。そのためう蝕原因菌のコントロールを行うのではなく、う蝕原因菌によるバイオフィルム形成の制御を行うことによる、より安全で効果の高いう蝕抑制方法の開発が求められていた。【解決手段】クオラムセンシングを制御する組成物による虫歯バイオフィルム形成の阻害。【選択図】図1