PubMed · 383525
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B D Shapiro. 1978. Vertical pin splinting process conserves tooth structure.. https://pubmed.ncbi.nlm.nih.gov/383525/
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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.
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Problems associated with fabrication of custom-cast posts with a plastic rod and autopolymerizing resin include voids in the pattern, locking of the pattern into undercuts, and resin fracture during removal of the pattern. This article describes a system for fabricating custom-cast posts with a thermoplastic resin to address these problems. The system consists of a plastic support rod and a thermoplastic resin. A custom post pattern can be quickly and easily produced by trimming the plastic rod, heating the resin either over a direct flame or in a low-temperature glue gun and seating it into a lubricated prepared canal. The resin flows well and thereby reduces voids. The resin is elastic enough to be removed from small undercuts without locking into the canal or fracturing.