What is the ruling on using miswak? Would brushing the teeth by using a toothbrush for using miswak?
It is sunnah to clean mouth and teeth with miswak or similar instrument while performing ablution (Mawsili, al-Ikhtiyar, I, 44). Because this cleaning is considered as part of the nature of humans (Muslim, Taharah, 56; Abu Dawud, Taharah, 29). Messenger of Allah (saw) said in a hadith, “Were it not that it would be too difficult for my ummah, I would have commanded them to use the tooth stick at every time of prayer.” (Ibn Majah, Taharah, 7).
In the practice of Prophet Muhammad (saw), the significant issue was to clean mouth and teeth and miswak was the tool used for cleaning teeth atthat time. Today we use toothbrush instead of miswak. One can fulfill this sunnah by means of using any instrument and method suitable to oral and dental health.
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS