Old Dental nurse shorthand

To return if necessary.
I worked with a dentist whose favourite was SHIGO..........see how it goes on!
I've been dental nursing since 1987 and seen a whole range of odd and confusing abbreviations.

To return if necessary

I have seen in dental notes of patients the word/term TRIN but cant think what it means as its not really a used term now but its bugging me not knowing haha




Thanks