sentences:  Cleanliness is an important part of Islam, including Quranic verses that teach how to achieve ritual cleanliness.Keeping oral hygiene through cleaning the teeth with the use of a form of toothbrush called miswak is considered sunnah, the way of Prophet Muhammad.Ritual ablution is also very important, as observed by the practices of "wudu", "ghusl", and "tayammum" (water-free alternative using any natural surface such as rock, sand, or dust).