Background: Various studies reveal that the elastic modulus of the Polyether Ether Ketone (PEEK) material is very close to dentin tissue; thus, less stress formation occurs in the tooth, and post-core restoration compared to other post systems was observed. In this context, PEEK post may reduce irreversible complications. PEEK is a new invention with a wide area of application in dentistry. The aim of the systematic review is to compile studies that focus exclusively on the mechanical properties, advantages, modifications of the PEEK material used as post and core material. Materials & Methods: This review was conducted using the electronic search from 2011 and 2021 by various databases like PubMed (Medline), Science Direct, Cochrane library, Embase Wiley online library, and the Web search Google Scholar, using keywords like Post/ posts, dowel/dowels, post and core, dowel and core with Polyether ether ketone or PEEK. The search was limited to articles published as full text in English, which were screened by two reviewers for eligibility. Results: All twelve eligible studies suggested PEEK as a reliable and contemporary option for dental post systems when used with appropriate surface treatment and luting agent. Significant reduction in the stress generated on the periodontal ligament (PDL) and cortical bone was observed when PEEK posts were used. Conclusion: PEEK post and core showed promising results with good mechanical and bonding properties. It can prove to be a successful alternative material to be used in clinical practice. However, clinical studies are lacking and more in-vitro and in-vivo studies are still needed to evaluate PEEK as post and core material.