Assess the long term stability of short dental implants in comparison to standard implants inserted simultaneously with inferior alveolar nerve lateralization.

Inclusion Criteria:

• Adult patients with edentulous posterior mandible.
• Both sexes.
• No intraoral soft and hard tissue pathology.
• No systemic condition that contraindicate implant placement.
• Residual alveolar bone width longer than 6 mm height (7-9 mm).

Exclusion Criteria:

• Presence of fenestrations or dehiscence of the residual ridge.
• Heavy smokers more than 20 cigarettes per day .(24)
• Patients with systemic disease that may affect normal healing.
• Psychiatric problems
• Disorders to implant are related to history of radiation therapy to the head and neck neoplasia, or bone augmentation to implant site.