Achieving prosthetically driven implant placement is a highly predictable treatment modality with reliable long-term results. Different surgical procedures have been used as a solution for reconstructing of the alveolar ridge with deficient volume. In the present study we demonstrate a modified alveolar ridge split technique for horizontal alveolar ridge augmentation (buccal plate repositioning technique) using the piezotome surgery. Evaluation of the effect of silica-calcium phosphate nanocomposite (SCPC) graft material versus demineralized freeze dried bone allograft (DFBA) in horizontal alveolar ridge augmentation before implant insertion will be performed.

Inclusion Criteria:

• Patients with horizontal atrophy of the posterior mandible with pristine residual alveolar crest width from 2 to 4 mm.
• Augmented area length in the mesial-distal direction of less than 20 mm.
• Adequate physically healthy condition.

Exclusion Criteria:

• A systemic disease that would contraindicate oral surgical treatment.
• Treated patients who had undergone therapy involving radiation
• Patients who had received bone resection as part of an oncological treatment after a bone augmentation procedure.
• Patients are subjected to intravenous and/or oral bisphosphonate therapy after the bone augmentation procedure.