Strictly speaking, your filling didn't cause the root to move in the gum, so you won't knock out the front teeth. Generally speaking, after you fill your teeth, the doctor just checks your occlusion. That is, the problem of vertical direction rarely involves horizontal direction, because it basically has no influence. Of course, I'm talking about the most common filling of teeth because of dental caries. If you feel sick in your mouth, you may not be used to it.