Abstract: One of the major purposes of making a prosthesis based on implant is to produce a superstructure by a Passive Fitness. If such a Passive Fitness is not met, then the implant components will fail which will ultimately result in the failure of the treatment. The aim of this research is to assess the effect of Splint on the dimensional variations of implant location transfer with a 25° angle by Open Tray Molding Method using polyether material. The research by an experimental-laboratory method was rendered on 15 specimens by 3 implant systems, tantamount to 45 specimens in each group and with 6 points (A-F). In order to produce the master cast of Velmix gypsum type IV and a vacuumed blender were used. By either of the Splint and Non-Splint techniques, 15 times molding was separately performed. Upon hardening of the gypsum, for a concurrent measurement of the casts, they were placed on the mantining plate by use of a clamp and by a multi axes Coordinator (x-y-z), it was used on the upper surface of the hex implant and the base of the cast. The statistical analysis used in this research was T-Test. The results of the research showed that the range of the dimensional variations of the implant location transfer by Non-Splint technique estimated at 170.2±68.4 and by Splint technique it was estimated at 169.8±71.7 and the T-Test demonstrated that statistically such difference was not significant. Thus, given that the Non-Splint molding method did not show a significant effect in diminishing the dimensional variations by Splint method and due to ease of manipulation and reduced time of molding process, the Open Tray Non-Splint method is recommended.