| 摘要 |
An aligning dental impression transfer method and apparatus is described in which the transfer of the bite registration in centric occlusion is accurately preserved from a triple tray impression to the positioning upon an articulator. At each stage of the casting of a working model the spatial relationship of existing dental structures are preserved. The cast model of the upper and lower dentition a in perfect registration on the articulator. In the process of manufacturing molded and machined parts, the limitations in dimensional accuracy exceed those desired by the dental patient. The patient is aware of binding or interfering "high spots" greater than 5 microns. The modern cavity mold and resulting thermoplastic parts cannot be expected to hold these dimensions. These variations in dimensional tolerance are eliminated in this invention. The articulator is equipped with an upper and lower frame with magnetic or other clamping means to hold the pin blocks in preliminary alignment. During the casting procedure, accurate alignment projections are cast using the same stone slurry compound used to make the dental stone casts. Mounting holes in the pin block are positioned over conical recesses in the mating articulator plate and held in place by the magnetic clamps. The slurry is poured and hardens to form conical projections fixed to pin block but removable from the mating conical recesses. Now the pin blocks can be removed and accurately repositioned in the articulator frame. Each conical projection is cast-in-place in each conical recess guaranteeing accurate alignment.
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