Question: what is the physical difference in a maxillary and mandibular full arch tray?
Answer: The maxillary tray covers the entire palatal area and the mandibular tray is horseshoe-shaped allowing for tongue movement 'frays also vary in length and depth. In addition, there are special trays, that are less deep, for use in edentulous arches. There are also quadrant trays (Figure 6).