The Dental Assault Chair is a machine used by Knightbrace in the boss fight against him in Operation: V.I.D.E.O.G.A.M.E.. It is equipped with 4 mechanical arms (A similar feature shared with the Chunk Wagon), the top two having cavity drills, one of them with a metal rod with toothpaste tubes which are smashed to fire shots of toothpaste and the other having a water or fluoride sprayer.
Knightbrace is invunerable to the shots given off by the S.C.A.M.P.P. or B.A.J.O.O.K.A., so the player has to take another method of defeating him. Knightbrace will slam both drills into the ground every once and a while, rendering him unable to turn or attack. The player must run behind him and shoot the bulging canister on the back of the chair to make Knightbrace take damage. Doing this numerous times will eventually defeat Knightbrace.