The aim of the study was to compare the clinical and radiographic changes between conventional implant and immediate implant placement after tooth extraction. Ten patients of both sexes( 6male,4 female) included in this study were received 20 implants. Each patient received two implants in the posterior region of the mandible . Dental implants were installed in the same surgical procedure , One of the implants was placed immediately after tooth extraction (test group ) and the other one was placed 6 months after the extraction (control group ) .