Objectives: The purpose of this study was to evaluate the influence of glass fibers in strength acrylic resin fracture around a overdenture abutment. A model was designed to simulate the clinical situation of an implant overdenture abutment (50-12-1.5mm). thirty specimens were divided divided into 3 groups, ( 10 specimens without glass fibers , 10 specimens with one glass fibers, 10 specimens with two glass fibers). All specimens were submitted to a 3-point bending test