Inclusion Criteria:  good general health at the time of surgery. at least 3 months of healing after tooth extraction. horizontally compromised alveolar ridges at least 10 mm high and 3 mm wide.  Exclusion Criteria:  a vertical bone defect in the edentulous ridge. thick cortex in the labial/buccal with less cancellous bone inside obvious undercut on the labial/buccal side. uncontrolled periodontal conditions or other oral disorders. history of radiotherapy in the head and neck region. uncontrolled diabetes mellitus or other systematic disorders. smokers. Pregnancy. non-compliant patients. allergic reaction to the medications used.