PURPOSE: Oral disease treatment and foul breath suppression composition including Alnus japonica extract is provided to remove the main component of foul breath and to prevent and treat an infective oral disease as well as to remove foul breath since the antibacterial activity about oral cavity pathogen existing in oral cavity is excellent. CONSTITUTION: Oral disease prevention and treatment composition includes Alnus japonica extract as an active ingredient. Alnus japonica extract is a solvent extract which is extracted by adding at least one solvent selected from a group comprising water, methanol, ethanol, ropanol, isopropanol, butanol, acetone, ether, benzene, chloroform, ethyl acetate, methylene chloride, n-hexane, hydrochloric acid, acetic acid, formic acid, citric acid, diethylether, and cyclohexane. Alnus japonica extract is the fraction obtained by successive fractioning of ethanol or methamol extract of Alnus japonica with n-hexane, dichloromethane, and ethyl acetate. A foul breath suppression composition contains Alnus japonica extract as an active ingredient.본 발명은 오리나무 추출물을 유효성분으로 함유하는 구강질환의 예방 또는 치료용 조성물 및 구취 억제용 조성물에 관한 것으로서, 오리나무 추출물은 구취의 주성분인 황화수소, 메틸 머캅탄 또는 황화디메틸을 제거할 수 있으며, 구강 내 존재하는 구강 병원균에 대한 항균력이 우수하여, 구취 제거는 물론 충치나 치주질환과 같은 감염성 구강 질환을 예방 또는 치료하는 효과가 있다.
