The Efficiency of Computer Guided Ridge Splitting Using Piezosurgery in Horizontally Deficient Posterior Mandible

Inclusion Criteria: * Patients with edentulous posterior area of the mandible insufficient width less than 5m, Both sexes. * No intraoral soft and hard tissue pathology * No systemic condition that contraindicate implant placement. Exclusion Criteria: * Heavy smokers more than 20 cigarettes per day. * Patients with systemic disease that may affect normal healing. * Psychiatric problems. * Disorders to implant are related to history of radiation therapy to the head and neck neoplasia, or bone augmentation to implant site. * Immunodeficiency pathology, bruxism, stress situation (socially or professionally), emotional instability, and unrealistic aesthetic demands.