As far as the tooth, I would be worried that it chipped deeply and the root may be damaged--like when we need to have a root canal. Hopefully, some will address this for you.
Do you have any idea what could have caused it? Check the cage for anything that he might have hit it on.
Are you using a water bottle or a bowl? Water bowls are safer.
My newest girl AnRa born 12-10-19, came home 2-13-20
RIP dearest Rana 4-19-15 --12-12-19, I will miss you forever
RIP my dear Nara 7/2/10---1/6/15. Mommy will always love you.