This comprehensive research delves into the various applications, advantages, and possible usage of Polyetheretherketone (PEEK) in restorative dentistry. The research highlights the complex demands of recovering teeth after endodontic treatment and highlights the need for materials that closely mimic the mechanical properties of native dentin and enamel. The analysis highlights the dynamic shifts in restorative dentistry by evaluating the unique qualities of traditional dental restorative materials like amalgam, gold alloy, and dental resin. By examining PEEK's physical and chemical properties, the analysis highlights the material's mechanical strength, resistance to plaque retention, and excellent biocompatibility. The development of PEEK via modifications, such as nano-TiO2/PEEK and BioHPP, which are purposefully created to get around constraints and improve mechanical strength, is investigated. The benefits of PEEK, such as its ease of milling and better fracture resistance, are highlighted, especially when it comes to the dental prosthesis production processes that involve injection and CAD-CAM milling. PEEK's adaptability and durability in particular applications, such as dental prostheses, post-core restorations, and endocrowns, are elaborated upon in further talks. PEEK's excellent elastic modulus, robust fracture resistance, and flexibility are highlighted in the paper's evaluation of the material in restorative dentistry. It recognizes limitations such as low fatigue resistance to bending and hydrophobic surfaces. The conclusion highlights PEEK's bright future, propelled by continuing research and developments in material science, and highlights the necessity of thorough clinical trials to reveal more about its complex benefits, drawbacks, and ideal uses for noteworthy restorative results.