Starfleet Dental

Starfleet Dental is a sub-division of Starfleet Medical, overseeing dentistry and related practices among Starfleet officers and their families.

During Admiral Leyton's coup on Earth in 2372, he reassigned several personnel to key positions at Starfleet Dental. These personnel included Senior Hygienists T. Snowden, J. Nzenwa, and hygienists A. Banda, W. Dunsel and A. Estradajem. 

In the Pendragon timeline, the reason for these seemingly innocuous reassignments eventually became clear. Leyton had placed Snowden, Nzenwa and the others in Starfleet Dental and other medical departments in order to systematically spread a personality-altering agent among Starfleet personnel. The pathogen would induce or enhance feelings of paranoia, which Leyton and those loyal to him would manipulate, stirring up fear of Changelings and aggression toward the Dominion. These factors contributed heavily to the Federation Civil War, and were only discovered years later. (: "Ruling from the Tomb", "The Nautilus Coil")