Custom impression trays. Part III: A stress distribution model

The Effect of One‐Step vs. Two‐Step Impression Techniques on Long‐Term Accuracy and Dimensional Stability when the Finish Line is within the Gingival Sulcular Area

“…Thirty impressions were taken using each material, with 15 obtained using each technique (one‐ and two‐step) (Fig ). The impressions were taken with prefabricated, perforated individual acrylic trays of 4‐mm thickness, as previously described . All impression materials were mixed in standardized proportions according to the manufacturer's recommendations.…”

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

“…Breeding et al 27 found that polymethylmethacrylate resin exhibited significantly higher mechanical property values than the thermoplastic resins tested. Moseley et al 34 found that yielding could be decreased by increasing the thickness of the tray material. Calculations of the moment of inertia indicate that the tray thickness must be increased to approximately 4 mm, 34 the same thickness recommended by TAK Systems for their thermoplastic resin (4 to 5 mm) 35 .…”

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

“…Breeding et al 27 found that polymethylmethacrylate resin exhibited significantly higher mechanical property values than the thermoplastic resins tested. Moseley et al 34 found that yielding could be decreased by increasing the thickness of the tray material. Calculations of the moment of inertia indicate that the tray thickness must be increased to approximately 4 mm, 34 the same thickness recommended by TAK Systems for their thermoplastic resin (4 to 5 mm).…”