To evaluate the efficacy of silicone, inlay casting wax, self cure acrylic resin as the dowel impression material for reproduction of intra-radicular surface anatomy by using injection technique is an indispensable method. By evaluating the accuracy of these three post impression materials, So that, the successful and durable dowel post could be achieved which gives us a better result and greater patients satisfaction. Therefore, this study can be helpful in bringing a scope for further vivo study and clinical preparation.