A dental treatment system comprises membrane treatment tray that is self-conforming to a persons own teeth when used with a sticky dental treatment composition and a support skeleton. The support skeleton maintains the flexible membrane tray in the form of tray prior to placing the tray over a persons teeth. A sticky viscous composition is either provided in or applied to the membrane tray, and then the treatment system is placed so as to position the membrane tray over the upper or lower teeth of the person. The support skeleton (internal or external) is separated from the membrane tray so that just the membrane tray remains over the persons teeth during the desired dental treatment. The sticky viscous composition holds the membrane tray against the teeth and helps it to at least partially conform to the shape of the teeth. The membrane dental tray is useful for teeth bleaching and other dental treatments known in the art.
