Endodontic therapy enables several advantages including maintenance of a natural tooth with restoration of its esthetics and functions. But endodontically treated teeth are often mutilated by caries fracture or previous restoration. Historically, many methods have been attempted in the search for an ideal foundation or build-up design for endodontically treated teeth. Dr. G. V. Black developed a porcelain-faced crown secured in place with a screw embedded in gold filling. Richmond crown was designed as a self-contained restoration with the post being a part of the final crown. Post can be either prefabricated or custom made. Custom-made post can be fabricated by either direct or indirect technique. In the indirect technique, impression taken should exactly replicate the parameters such as design, length, surface configuration, and diameter. The main problems while taking the impression of post space are incorporation of voids in the radicular portion and the inability to produce accurate impression in all dimensions. It mainly affects the quality of fabricated cast post. Therefore, this study is undertaken to compare the different impression techniques used for post space. It is expected that the study will reveal some useful information about the impression techniques that can be used to reproduce accurate and void-free impression of post space.