Digitally predesigned positioning tray and custom restoration shell for immediate implantation prothesis: a digital workflow.

The present article introduces a new digital workflow for the fabrication of an immediate implantation prothesis. With this technique, based on the surgical planning, the positioning tray and the restoration shell are predesigned and premanufactured together with the implant guide before the physical surgery. After implantation, the restoration shell is placed and bonded with a temporary abutment guided by the positioning tray, which acts as a type of tooth-borne device to guide the placement and bonding of the immediate restoration. The restoration shell acts as a type of hollowed out restoration in the tissue surface to improve the implantation error tolerance.