Bleaching Tray Fabrication

This Video from Ultradent Shows How To Make A Bleaching Tray

[@katiehewitt1747]

What material is used for the reservoir on each tooth?

[@CuringLights]

Thanks for the question:
Ultradent Blockout resin
www.ultradent.com/products/categories/whitening/tray-fabrication/block-out-resin