Alpaca, I don't know about down under but up over, radiation issues aren't studied much and finding healthcare providers with enough knowledge to help is virtually nonexistent. It is the highest cost of aftercare yet the least understood. There are some discussions with very knowledgeable and skilled doctors that have baffled me, to say the least. I think it is because of the randomness of how symptoms present that make it all seem much larger than it is. I have been told by many that it is just premature aging and we just have to accept the toxicity of treatment adds 20-30 years to us.
A good dentist can help extend the teeth with the most serious abfractions before they break off. Crowns are good if they extend deep enough into the gums to prevent abfractions but some dentists don't and the crowned teeth even break off at the gums.
As far as researching more, my feeling over the years has been to keep away from that. I don't know if that has helped or hurt, though. I do know of the studies of more advanced late effects of radiation, none of the subjects have lived and I have, so far, outlived almost all of them.
We need more studies to identify this earlier on and treat it before it becomes a spiral to death. With the likelihood of the problems coming 6-20 years after treatment, there is no incentive as positive outcomes are based on 5 year survival rates.