Publicación: Estudio in vitro de la estabilidad dimensional de troqueles para prótesis fijas de tramos largos tomados con cubetas prefabricadas metálica perforada y cubetas individuales de acrílico-autocurado
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Introduction: For making impressions for fixed partial denture, silicones are preferred by adding for high dimensional stability and detail reproduction. The trays are needed for use; they can be prefabricated metal or individualized self-curing acrylic. Materials and Methods: We performed a study in vitro, comparing experimental with a convenience sample of 10 plaster models obtained from 10 impressions taken with 5 trays and 5 prefabricated perforated metal trays, self-curing acrylic. And a stainless steel model that simulated the lower jaw. The taking of measures of plaster models and the stainless steel model was performed by a single operator through a stereoscope Brand Nikon Model CPs 160, Series 1,005,941, first calibrate the model in stainless steel by measuring the height and diameter of abutment teeth canines and first molars 33-43 and 36-46 of inter-distance between 33-43 and 43-46 and then the plaster models were measured and compared the results using descriptive summary measures and averages through the test Mann Whitney. Results: None of the measurements taken on models with both types of basin revealed statistically significant differences p> 0.5. Conclusions: No statistically significant difference in taking impressions with prefabricated metal perforated trays and buckets of self-curing acrylic.