Tooth extraction while fasting.
Some people think that extracting a tooth in the state of fasting breaks the fast, whereas the correct view is that extracting a tooth while fasting does not break the fast. This is because the breaking or not breaking of the fast is related to things that reach below the throat; since the tooth is above the throat, there is no harm in extracting the tooth itself. However, if the blood that came out while extracting the tooth was swallowed along with saliva, and the blood was dominant over the saliva, then the fast will break; and if both are equal, even then by way of juristic preference (Istihsanan), the fast will break. (Aham Masail/Vol:4/Page:92)