My concern would be the lack of control. With a thin brush, you can usually tell where you have cleaned (if you pay attention), and not miss a spot. Chewing th

My concern would be the lack of control. With a thin brush, you can usually tell where you have cleaned (if you pay attention), and not miss a spot. Chewing this big sponge, I will not be confident that I have reached everywhere. There could be a systematic error (say a slight, unusual curve on one tooth) that leaves a spot chronically unclean without me realizing it.