Composite dental bonding on teeth: can it be completely removed (and not replaced) and why are the back of my teeth rough?

Hello, let me try to answer your questions in order.
1) fillings can be separated from the tooth, but it may be necessary to touch the teeth a little with abrasions because composite fillings are materials that are chemically bonded to the teeth
2) The feeling of roughness you feel at the back of your front teeth is either due to the pickling process or you can also feel it if the composite has been made in that area but not polished. These areas do not create an area suitable for decay, but they give you a feeling of discomfort, so it is useful to polish them.

Hi jmacd25, the bonding is used to fill the cavity caused by a tooth decay, and also for esthetic composite veneers, like helping closing a gap. Bonding would not prevent the tooth decay if you don't have a good oral hygiene, this is caused by consuming a lot of carbohydrates (sugar) and not brush and floss your teeth. The etching with acid is a technique we used for microscopical penetration of the bonding, the cause of feeling like sandpaper in the back, is the lack of polishing your composite in the border of your tooth.