Although bones and teeth both contain calcium, phosphorous and traces of other minerals, teeth only contain traces of sodium.
The major structure of teeth is called dentine and it’s much denser than any bone. It contains no collagen at all but a bone is mostly composed of collagen which is a living protein.
Bones are covered in a living membrane, the periosteum, which also contains osteoblasts, and osteoblasts are living cells which generate new bone and which get to work immediately whenever a bone is injured.
Teeth are covered where they are exposed with a hard non-living mineral deposit called enamel. Although teeth can repair small holes in enamel, dentine cannot be repaired: broken teeth do not repair themselves.
Almost all bones contain marrow which manufactures blood cells. Teeth only contain dental pulp which contains nerves and a blood supply to keep those nerves alive, but they generate no marrow at all.
In short, teeth are not bones.