This work involved extensive crown lengthiness, root canals, porcelain (over metal) crowns, and bridges. This took 2 1/2 years to complete, and at least 50 trips to Boston from my home, in Maine. I wasn't given any followup care information. Do I still get regular dental check ups, even though all teeth are crowned? Will they yellow, and if so is there something I can use to whiten them? Do I still use regular toothpaste?