Deficient alveolar mandibular ridge corrected distraction osteogenesis to facilitate dental implant placement. Patients grouped into 2 groups: one group received Cissus quadrangularis during the consolidation period, and the other group received placebo.

OPGs were taken immediately after distractor placement, at end of activation period, at 1st,2nd month of consolidation period, and at end of consolidation period. Change in bone height was evaluated immediately after distractor placement, at end of activation and end of consolidation periods.

CBCT were taken immediately after implant installation, and 6 months later to evaluate change bone density and marginal bone level about the dental implant.

histological evaluation was done by biopsy obtained, by trephine bur, from implant site during its preparation. The bone biopsy fixed in 4% formalin solution for 7 days, rinsed in water, and dehydrated in sequent phases of ethanol (70, 80, 90, and 100%) and then specimens were stained by hematoxylin- eosin for microscopic evaluation.

Radiographic evaluation

Inclusion Criteria:

• Patients were included if they were free from any disease that may affect healing. Also, presented with 2-3 missing teeth at least in posterior area and CBCT showed bone height above inferior alveolar canal (IAC) ranged 8-10mm.

Exclusion Criteria:

• patients were excluded if they suffered from any disease affect tissue healing, bad oral hygiene or heavy smoking patients