I render the wolf teeth and get this

I render the wolf teeth and get this ,tooth color is there .Why does it render like this?
Thanks

Probably duplicate meshes
Check there is no duplicate objects in the same location as each other.
Remove double vertices (select all vertices and W / remove doubles)
Recalculate face normals (select all vertices and Ctrl+N)

Thank You so much Richard!!! You helped me alot!