Dental implants supported restorations have been widely accepted as one of the treatment modalities to replace missing teeth and to restore human masticatory function. Successful osseointegration from the clinical standpoint is a measured by implant stability, which occurs after implant integration. Osseodensification is a bio-mechanical site preparation technique. It utilizes a multi-fluted densifying bur technology that creates and expands a pilot hole without excavating significant amounts of bone tissue through a unique, highly controllable, fast, and efficient procedure with minimal heat elevation.

Aim of the study: Is to evaluate and compare the efficacy of using osseodensification compared to conventional bone expansion in implant stability and ridge expansion.

Inclusion Criteria:

• Missing maxillary anterior tooth, having moderate horizontal ridge defect in which the alveolar ridge width is( 3-4) mm, and its height is not less than 10 mm.
• Presence of adequate keratinized mucosa.
• Patients with good oral hygiene.
• Patients are free from any systemic diseases that might affect healing.
• Presence of adequate inter-occlusal and mesiodistal space that permits placement of fixed prosthesis.

Exclusion Criteria:

• Heavy smokers and bad oral hygiene patients.
• Medically compromised patients that affecting placement of implant.
• Alcohol or drug abuse.
• Pregnant women.
• Patients suffering from osteoporosis.
• Current chemotherapy or radiotherapy.