Background: An impression is a negative imprint of an oral structure that is used to create a positive reproduction of the structure for use in prosthesis or dental restoration manufacturing, or as a permanent record. The present study was conducted to assess the accuracy of implant impressions obtained from different types and viscosity of silicone impression materials. Materials & Methods: Two dental implants holes were drilled in the lower lateral incisor in both sides in the lower edentulous cast, two implants fixtures size 12mm/Ø4 of Dentium Company inserted in the drilled holes. Three types of impression technique used and the evaluation of the accuracy of the impression technique with different impression materials were tested. Group I: closed tray technique (Monophase A-silicone impression material, Heavy/light body A silicone type impression material and putty/light body C-silicone type impression materials) (n=10). Group II: Open tray technique (Monophase A-silicone impression material, Heavy/light body A silicone type impression material and putty/light body C-silicone type impression materials) (n=10). Group III: Snap-On Impression technique (Monophase Asilicone impression material, Heavy/light body A silicone type impression material and putty/light body C-silicone type impression materials) (n=10).