
1) Diving medicine
Found on
https://www.crosswordclues.com/clue/barodontalgia

Barodontalgia, commonly known as tooth squeeze and previously known as aerodontalgia, is a pain in tooth caused by a change in atmospheric pressure. The pain usually ceases at ground level. The most common victims are SCUBA divers because in deep dives pressures can increase by several atmospheres, and military pilots because of rapid changes. In ...
Found on
http://en.wikipedia.org/wiki/Barodontalgia

Type: Term Pronunciation: bar′ō-don-tal′jē-ă Definitions: 1. Pain in the soft tissue resulting from a disequilibrium in the air-filled spaces around a tooth caused by ascent or descent into places with differentiatial barometric pressure. Synonyms: tooth squeeze
Found on
http://www.medilexicon.com/medicaldictionary.php?t=9512

barodontalgia Toothache associated with the reduction in atmospheric pressure in high-altitude flying. Also: aerodontalgia.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1450/
No exact match found.