بسم الله الرحمن الرحيم
There are two objectives in using a miswak:
- Emulating and following the Prophet صلى الله عليه وسلم
- Cleansing of the mouth and teeth.
By using a toothbrush and toothpaste the second objective will be obtained, but a person will not receive the rewards of following the Sunnah.
أفضل التطبيق العصري على مسائل القدوري
للمفتي محمد أشرف الاشاعتي
Vol.1 Pg.98