Immediate Versus Delayed Loading for Implants Retaining Mandibular Complete Overdenture

Inclusion Criteria: * Patient having two standing mandibular canines with compromised prognosis (which indicted for extraction, without any preapical lesions nor acute infection) and have an adequate labial bone thickness. * Patient having opposing completely edenteolous maxilla. * Patients having normal maxilla-mandibular relationship and sufficient inter arch distance was insured by through tentative jaw relation record. * Patients with good oral hygiene. * Enough bone volume for implants in the interforaminal region (adequate bone quality and quantity) Exclusion Criteria: * Mental disorder patients who are not capable of making a decision or narcotic drug addicts. * Patients with Tempro-Mandibular Joint disorders * Patients undergoing radiotherapy or chemotherapy * Patients with systemic diseases affecting bone metabolism * Uncooperative patients who have no understanding of the need of a regular follow-up. * Patient with pathological defects in the areas of implant insertion. * Vulnerable group as prisoners, mentally retarded patients.