What is it called when the teeth start breaking down on the inside instead of the outside?

Answer 1

IF I UNDERSTAND CORRECTLY YOU MUST MEAN PATHOLOGY WITH THE ROOTS. THERE IS SOMETHING CALLED INTERNAL RESORPTION. OTHERWISE THE COST COMMON IS A CAVITY IN THE VERY CENTER OF A BACK TOOTH. THE SMALL DECAY BLOWS UP AND MAY BE MISSED BY THE DENTIST BY A CURSORY LOOK. THIS IS WHY X-RAYS ARE SO IMPORTANT.