Transfer Trays

Our standard transfer trays used with the "custom base" consist of a clear two-part design. Unless otherwise specified, we deliver the transfer trays to your practice with no sectioning or splitting. However, some offices prefer to have the trays sectioned at the dental midlines or even in three pieces per arch when the molars are bonded – they report that sectioning the trays helps in maintaining the isolation and dry field. When we have a request to cut the trays, the inner and outer trays are always sectioned in the same manner. In other words, if there is a mid-line split it will be on both the inner and outer trays.


The "Inner" Transfer Tray


The inner tray is cut to extend slightly below the general line along the gingival border and extends over all dental surfaces on the lingual. An alternative inner tray design adds a vertical slit on both sides of each tooth in this tray. The resulting tabs can be peeled up individually to release the brackets from the tray. In some instances during clinical seating, the inner tray may be separated from the outer tray and seated first with a slight "flexing" as needed due to crowding or rotation of the teeth. The outer tray is then seated immediately over the inner tray.


The "Outer" Transfer Tray


The second tray (or "outer tray") is fabricated from 1mm hard, clear acrylic. Once again, both our inner and outer trays are routinely made in clear acrylic for practices that utilize light cure bonding. As the outer tray is formed directly over the inner tray, it will create a very tight fit. The outer tray is typically left a couple of millimeters longer than the inner tray along the labial and buccal areas. This ensures that the tray will fit completely over the bracket portion in the patient's mouth and allow the clinician to exert passive pressure in holding the brackets against each tooth. By having a precision fit outer tray it is not necessary to "press" the brackets against the teeth during clinical bonding. With the old style silicone trays, pressing one area would frequently result in the tray popping up in another and compromising the integrity of the bond strength.