It has been proven that if rats are put on a diet and all solid objects are removed from the cage, then giant incisors

It has been proven that if rats are put on a diet and all solid objects are removed from the cage, then giant incisors will grow, which deprive them of the opportunity to eat. What does this fact indicate?

Or this indicates that the rodent’s body is constantly aimed at the growth of the incisors, so that they are adapted to constant work (i.e., they do not grind very quickly) and when they stopped eating themselves, they stopped grinding them, they just grew like on throughout life. Or this is evidence of idioadaptation: if the canines are not used, then they will be large so that they cannot be used. Degeneration that is not used will acquire non-functional signs (like reduction of vision in a mole).