But her teeth are good? I have experience with “perfect” teeth and overgrown roots. It isn’t a common condition in rabbits though. Typically, a rabbit with tooth root problems has other tooth-related problems like overgrown teeth, spurs, etc. This condition is much more common in chinchillas. Unfortunately, they seem to do a lot worse with it. Aside from extraction, there is no cure for tooth root elongation once it occurs. However, progression can be slowed with proper diet (hay) so the teeth wear properly. Long term maintenance also includes treatment of the secondary symptoms. Pain medications are often prescribed. Tooth roots in the sinuses can also lead to infections, which are just treated as they occur. Eye discharge can become more or less chronic.
NOTE: If the rabbit has other tooth problems, they need to be addressed (filed, etc) first. Misaligned teeth and uneven surfaces cause a lot of problems… but they also cause tooth root elongation to progress.