[0070] Oral compositions comprising a first and a second abrasive are provided. The first abrasive preferably has an Einlehner hardness of greater than about 5 mg loss per 100,000 revolutions, and the second abrasive preferably has an Einlehner hardness of less than about 5 mg loss per 100,000 revolutions. A ratio of the forst abrasive to the second abrasive ranges from about 1:1.6 to about 1.6:1, and the first and second abrasives are preferably present in the oral composition at an amount of about 13% to about 21% by weight, respectively. The pellicle cleaning ratio of the oral composition is greater than 100 and the radioactive dentin abrasiveness is preferably less than 200, and in certain embodiments, preferably less than about 175. Methods of using the oral compositions are also provided.[0070]提供具有第一和第二研磨劑之口腔用組成物。第一研磨劑較佳具有艾氏(Einlehner)硬度每100,000轉數大於約5毫克損失,第二研磨劑較佳具有艾氏硬度每100,000轉數小於約5毫克損失。第一研磨劑對第二研磨劑之比例為約1:1.6至約1.6:1,且第一和第二研磨劑較佳存在於口腔用組成物中之量分別為約13%至約21%重量比。口腔用組成物之薄膜清潔比例大於100,輻射活性牙本質磨耗度較佳小於200,且於某些具體例中,較佳小於約175。亦提供使用口腔用組成物之方法。
