Here’s how Becky avoids toothbrushing battles:
I use two toothbrushes. One I give to my son so he can brush his teeth while I take the other one and brush his teeth at the same time. I used to let him brush his teeth first and then take the toothbrush and brush his teeth myself. This didn’t always work out because he wouldn’t always open his mouth for me. With the two toothbrushes I can be brushing his bottom teeth while he brushes the top ones and there’s no problem.