Fixation Free Sandwich Osteotomy With an Interpositional Inlay Graft in Compere to Conventional Sandwich Osteotomy

Inclusion Criteria: * Both sex * Adulte patient (18-60 y.) * Highly motivated patient with good oral hygiene * No systematic diseases or conditions known to alter bone healing. * No local pathosis that may interfere with bone healing. * No recent history of augmentation procedure at the same area. * Criteria of the edentulous ridge: * The anterior maxillary vertical dimension is minimum 10mm, measured from the crest of the ridge to the nasal floor. * Horizontal ridge dimension remains normal; at least 6mm. * The minimum number of the missing teeth is minimum 2 teeth and the maximum will be the six anteriors. * There will be increased inter-arch space compared with the adjacent teeth. Exclusion Criteria: * uncontrolled Diabetes mellitus (DM) * pregnancy * uncontrolled local factors(periodontitis), or acute infection related to the aera. * smoking: more than 20 cigarettes \\day * intravenous bisphosphonate * patients who had received radiation treatment in the head and neck region. * previous bone augmentation in the site within 6 months.