Ridge split augmentation technique, with immediate implant placement, reduces the time of the treatment and the time of the final prosthetic reconstruction. Furthermore, compression of the bone increases its density. SMV is also found to promote osteogenic differentiation of bone marrow stem cells, suppress osteoclastic differentiation in bone tissue, and promotes osseointegration around implants in animal studies. The aim of this study is to compare surgical outcomes of the application of the alveolar ridge splitting (ARS) in combination with guided bone regeneration (GBR) using bone grafting and a barrier membrane, associated with immediate implant placement versus ARS in combination with the use of SMV with GBR using bone grafting and a barrier membrane, associated with immediate implant placement in patients with horizontally atrophic jaw bones.

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.