Thank you so much for your reply - very helpful. This was exactly the issue I'd become confused about, and you have finally clarified things for me. At least now I know where the confusion over the term lies - old or new school and can simply ask a dentist, if they refer to this, what they mean when they refer to centric relation. I guess, on further reflection, it means the same thing - the ideal position for the jaw - but where that position is believed to be, has changed with further study, advances etc... I clearly need to see someone who has kept up to date on the latest research.
Many, many thanks again.