Comparison of the dual-arch impression technique and the complete-arch custom tray impression technique, in the dimensional accuracy of gypsum dies generated, and in patient comfort: A clinical study

Abstract

Dual-arch impression trays are often used in fixed Prosthodontics, to generate impressions of the prepared teeth and opposing arch, simultaneously. Lack of support and confinement of the impression material, variation in impression material thickness and flexibility of dual arch impression trays is of concern in generating accurate working dies. A clinical study was conducted to compare accuracy of gypsum dies generated from metal and plastic dual-arch tray impressions with those generated from complete-arch custom tray impressions, using different vinyl polysiloxane impression materials. The level of patient perceived comfort was also assessed. It was concluded that dual arch impressions were preferred by the patients and those made with rigid tray material, produced working dies that were closest to the implant abutment used.