Tooth position index for the fabrication of a mandibular implant-supported overdenture bar.

This article describes an index for the fabrication of a mandibular implant-supported overdenture bar. The index is a two-piece mold made from an addition silicone putty material. It is used to record and maintain the relative position of the morphologic contours of the trial denture to the master cast. The split-mold design permits direct visualization of the amount of space available for the design of the retentive bar from both the facial and lingual aspects while ensuring room for an adequate thickness of the denture base resin, without the need to remove the teeth from the trial denture wax-up.