الفهرس 
Evaluation of impression accuracy in implant splinted and unsplinted open tray technique
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Abstract
This study aimed to evaluate the accuracy of two different impression materials used with an open tray technique in case of splinted and unsplinted techniques. An impression was taken to a prototype with missing lower left second premolar, first and second molars. The impression was poured using transparent acrylic resin and two implants were inserted in parallelism in the area of missing lower second premolar and lower second molar and were fixed in place with the help of the self curing transparent acrylic resin.Twenty self cured acrylic resin custom made trays were fabricated with the help of 2mm thickness vacuum spacer. Two impression materials were used with two impression techniques using an open tray. group (1): Unsplinted open tray technique which was further subdivided into two subgroups: Subgroup A (vinylsiloxane ether) and subgroup B (polyether).group (2): splinted open tray technique which was subdivided into two subgroups: Subgroup A (VSXE) and subgroup B (polyether)