Now, in just one simple step, you can capture the prepared teeth, the opposing arch, and the bite registration using the Harmony Anterior Tray. The Harmony Anterior is an anterior tray and a facial plane relator, identifying the patient’s midline, in one device. The Harmony Anterior Dual Arch Tray can be used without alignment sticks for single units, or with them for multiple units. No more slanted crowns or veneers.