This type of tray is used for taking impression of:: (A) Extremely resorbed ridges, (B) Restricted mouth opening cases, (C) Flabby ridges, (D) In patients with severe gag reflex
Answer is C. This tray is made by using window technique and is used for taking impression of ﬂabby ridges. Flabby tissue is recorded using mucostatic material like low viscosity elastomers.