How to prevent molar spurs

Hi! I'm a new chinnie owner and have had my Chinchilla, Mr. B, for about a month now.

On Friday he started rubbing his mouth/grinding his teeth and kind of wincing in pain. I brought him to the vet and she says he has points on his molars that are causing inflammation in his mouth, so I am going to take him to get them shaved down by a specialist vet soon. Right now he seems fine and is still eating/drinking at least, but a bit underweight which might be bc of the molar spurs. I feed him...

How to prevent molar spurs