Abstract : The full mouth rehabilitation of the severely worn dentition is a difficult treatment; occlusal veneers represent an associate choice to ancient treatment ideas. Aims at replacing the lost tooth substance while not the extra removal of remaining tooth substance. Forty human premolars were prepared to simulate advanced erosion of the occlusal surface, and at random divided into four experimental groups (n=10) according to the material used to build the veneers. The veneers were adhesively luted and submitted to thermocycling device. The fracture resistance test was performed on a universal testing machine. Failure analysis of the fractured occlusal veneer in this study showed mainly fracture of mode I fracture of the restoration (75%) followed by Mode II, fracture of the restoration and enamel (12.5%); or Mode III, fracture of the restoration, enamel, and dentin (12.5%). According to a one-way analysis of variance and the least significant difference test, the highest mean fracture resistance was obtained from IPS Emax CAD and was significantly higher compared to the other experimental groups. The lowest mean fracture resistance was obtained from Tetric CAD. All occlusal veneers used in this study can be considered as acceptable treatment in the premolar region for patients with parafunctional habits. minimally invasive occlusal veneers can be applied to correct tooth wear and thus replace conventional crown restorations