Clasp retainers made of metal alloys may be esthetically unappealing or cause allergic reactions. To investigate alternative materials. we used the nonfiller polyetheretherketone (PEEK) to fabricate the clasp retainer of a removable partial denture for the mandibular bilateral distal free-end abutment of an 84-year-old female. Two years later. https://parisnaturalfoodes.shop/product-category/ubiquinol-100mg/