Alveolar Ridge Augmentation Following Self-Inflating Soft Tissue Expander

Inclusion Criteria: * All patients should have partially edentulous ridge (missing upper one or two neighboring anterior teeth or premolars) of the maxilla. The edentulous area should require horizontal bone augmentation procedures owing to lack of sufficient residual bone. * All patients should not have any particular medical history (medically free) according to Burket health medical history questionnaire (Glick et al.2008). * All patients should not have any known contraindication to oral surgery. Exclusion Criteria: * Smokers will be excluded from our study. * Patients with poor oral hygiene or not willing to perform oral hygiene measures. * Patients who showed residual infections in the edentulous area or apparent infection in a neighboring tooth. * Patients with systemic diseases such as diabetes mellitus and hemorrhagic disorders, patients receiving intravenous bisphosphonate therapy or systemic corticosteroid treatment. * Patients with occlusal discrepancies will be excluded. * Vulnerable groups (as pregnant and lactating females, and decisionaly impaired individuals) will be excluded from the study.