#$%^&*AU2017202098A120171019.pdf#####ABSTRACT A dental treatment tray device comprising a horseshoe shaped insert with peripheral front and rear walls 16 defining a trough shaped device 12 in cross section with an intermediate base layer. The front and rear walls 14 and 15 and the base layer are lined by means of gauze impregnated with dental treatment material 18.116 22 20 18 16 17 12 14 10 11 24 Fig. i