No, as you remain responsible for your own medical and dental cover while in RMR. The purpose of the medical is only to ensure that you don't have an existing injury or disability which would prevent you from completing training.
Once trained however, you would be required to pass further medical and dental checks if you are going to deploy and will not be mobilised with an existing problem.
If you suffer a medical or dental problem whilst mobilised or on FTRS, then the Corps takes care of it.
If you are injured during training it will be assessed if it is related to the training received and appropriate action taken. This would only extend to dental work if for example you got all you teeth knocked out a frustrated member of the Training Team....Alles Klar?