siwak

Respected scholars of Islam, as-Salamu `alaykum. It is generally known that cleaning one's teeth is recommended in Shari`ah. Does this contradict the hadiths that praise the odor that comes from the mouth of the fasting person?

Scholars of Islam, As-Salamu `Alaykum wa Rahamtu Allah wa Barakatuh. May Allah accept your efforts in explaining the truth for people! I have a question that I would like you to clarify. I use the modern toothbrush instead of the traditional siwak; is it ok? Moreover, what is the virtue of using Siwak in Islam?