My father was a dental technician just prior to WW2. He joined the 2nd AIF and was posted to Fortress Engineers as a sapper (go figure). Eventually transferred to infantry (and just missed on being a reinforcement to 8 Div) and then was "discovered" by the Army and posted to AADC.
One of his COs was a dentist from WWI ("a re-tread" as all those with WWI experience were called by the less kindly) and he tells the tale of one camp hospital (attached to an Infantry Brigade) they were attached to in the Northern Territory....
"It was a particularly long sick parade one morning and the first patient who was complaining of sore gums and loose teeth was presented to the dentist. He took a look and thought of local infections and prescibed a mouth wash ("come and see me in the morning"
). Next patient, same problem, same solution but dentist looked pensive. Third patient, same problem, dentist worried. Walked out of tent and asked the lineup who was complaining of similar symptoms - most were. Closed the Sick Parade, grabbed the members of the dental unit and headed for the communal kitchens. He inspected the first cooker (old style boilers a la film Zulu - they were still in use when I was in the Army in the 1970's!) and turned it over and instructed his men to do so to every other one (shades of Zulu!).
He had seen and diagnosed Vincent's Angina a bacterial disease of the gums and mouth (and upper respiratory tract) which results in sore gums, lose teeth and a choking sensation from the ulceration of the mucous membranes of those areas.
The cooks were heating and reheating water used in "dixie bashing" and even washing in those boilers. One person had had the infection and by contact with utensils through the water it to infect many members of the Brigade. Apparently rended many temprorarily unfit for duty....
He had seen it in WWI - it was also known as "trench mouth".
PS The dental units (unofficial) motto - to give every person 16 fit pairs of opposing teeth (own or artificial) so that if they run out of bullets they could at least bite the enemy!