[esanamaserrn]

Miswak is a "portable" toothbrush with built in toothpaste. You could carry a standard toothbrush with a travel sized toothpaste tube and then brush your teeth whenever you like? You would need some water to rinse your mouth. As I said miswak can be used in conjunction with today's dental equipment. I doubt nobody today uses only miswak to brush their teeth - you use a brush and paste too? Further miswak alone doesn't clean behind the teeth effectively and in between them; you still need floss to remove food particles lodged between teeth?

Remember that's all the Prophet (saw) had available. If the Philips sonicare existed - he might have used that? Likewise, for the toilet he used stones / clay pieces and not tissue which we use today.