The PEEK Medical Polyetheretherketone is a high performance polymer. The materials in this group combine excellent mechanical properties with the highest biological compatibility. PEEK is used in aircraft construction for heavy parts and for medical applications. He has experienced an evolution in the field, especially for the manufacture of dental prosthesis frameworks. The elasticity of the material that is the same as the bone tissue makes it similar to nature since it can compensate for bone torsion, especially in the presence of major implantation work. He replaced titanium because of its properties and qualities. This work to demystify this material in its advantages and limitations as well as its place in the current dentistry.