International Journal of Engineering and Information Systems (IJEAIS)   Year: 2019 | Volume: 3 | Issue: 5 | Page No.: 44-56 Effect of Curing Process on Compressive Properties of Dental Composite Resin Meshref A. A., Mazen A. A., El-Giushi M. A. and Ali W. Y. Abstract: The objectives of this study is to determine the effect of light curing times and curing modes on the compressive properties of hybrid composite resin. The material used was hybrid composite resin of shade A1. The hybrid composite resin specimens were placed in plastic bars with size of 6 mm diameter and 10 mm in height. The specimens were then cured from both sides for 10, 20, 40, 60 and 80 seconds using a visible light curing unit. The light curing modes used were gradually strong, flashing and strong mode. Compression testing was carried out at room temperature on tensometer using spring load 10 KN. Specimens of curing time 40 seconds exhibited higher compressive properties compared to 10, 20, 60 and 80 seconds curing time. The use of gradually strong curing mode resulted in higher compressive properties for the hybrid composites resin compared with the compressive properties obtained using the flashing mode and strong curing mode. This study indicated that, gradually strong curing mode produced dental composite resin with higher compressive properties and 40 seconds curing time gave higher values of compressive properties. Compressive properties results are significantly affected by curing times and curing modes.