ds is 4 now... and while his teeth are brushed by me twice a day with age appropiate toothpaste and a battery toothbrush (sometimes with a regular one too if he's tired) and he has a 'practice' brush on his own too. i've noticed some build up on his teeth which concerns me none the less, the dentist seems unbothered by it. i'm careful with what he eats and drinks when as i know all too well how costly dental repair work can be!
is it normal? it's not horrible looking or even super noticable (not that i worry about that, the health of his teeth is my prime concern). is there something else we could be doing?
thanks in advance