How are the Indirect Bonding trays fabricated and used?
There is a soft inner tray made from 1.5-millimeter flexible Bioplast (from Great Lakes Orthodontic Products) with a hard outer shell made from 1.0-millimeter Biocryl. The hard tray fits precisely over the inner tray. An important step in our laboratory is the block-out applied to the brackets before the trays are formed on the Biostar machine. The block-out is used around the hooks, wings, and undercut areas; brackets are held firmly, but easily disengage when the trays are removed after the bonding process. The outer tray provides rigidity to the overall system after the trays have been seated in the mouth. Most practices are using the trays in a complete-arch segment; the trays are not split into sections or quadrants. If your practice prefers to have the trays sectioned, specify that in your standing instruction file. Another option available for practices using the clean-base technique is the original silicone-putty trays. If your practice prefers to use them, indicate that on the
