Assemblies and apparatus for supporting gum tissue during and after periodontal surgery using a tray having a body with a buccal wall, a lingual wall, a tooth covering portion forming a cavity defining internal recesses for the enclosed teeth, in one embodiment a raised seal formed longitudinally on an inner surface of one of the walls along its gum line and applying a biasing pressure thereto to support and stabilize the gum tissue to prevent deflection and alteration, the opposing wall extends substantially from the exposed portion of the tooth to enclose a spaced apart portion of the corresponding gum tissue therefrom and a contoured cavity extends outward from the gum tissue along the gum line forming a medicament holding chamber between an inner surface of the opposing wall and its corresponding gum tissue.
