Evaluation of corrosion products in dentin after removal of old Amalgams with and without roughing

To evaluate of corrosion products in dentin after removal of old Amalgams with and without roughness Twenty Class II cavities were prepared on extracted premolars then Randomly were divided into four groups according to how they were restored. Group 1: Lightcured packable composite to establish a microleakage baseline; Group 2: A high copper Amalgam; then stored in 37C normal saline for 6 months to create amalgam corrosion products. Group 3: Identical to Group 2, but later the amalgam was replaced with composite leaving the cavity walls intact. Group 4: Identical to Group 3 except the cavity walls were extended 0.5 mm after amalgam removal prior to insertion of the composite. There are 5 specimens in each four groups for EDX analysis.Evaluation of EDX analysis was descriptive. Corrosion products were detected in Groups 1,2,3 but were not detected in Group 4. After amalgam removal, roughing dentinal walls could remove the corrosion products penetrating it.