If a broken bone can re-growy, why can't a broken tooth also repair itself?!
Question:
If a broken bone can re-growy, why can't a broken tooth also repair itself?
Answers:
teeth has enamels which can not regenerate, bones can be rebuilt, because bones have osteoblast cells which build bones.
as a matter of fact, bones are constantly being reaborbed and rebuilt, even though they may look like as if they are not growing at all, but body has osteoclast cells that reaborb bones, while osteoblast cells build bones.
that is why when people grow older, they are more likely to have broken bones, that is because their bones are not as dense as before due to osteoclast cells.