Zhao K, et al. - Authors assessed the clinical outcomes of vertical distraction osteogenesis (VDO) for patients with vertically deficient alveolar ridges in terms of the cumulative implant survival rate, bone gain, bone resorption before and after implant insertion, and complications. Successful rehabilitation of vertical alveolar defects could be done with distraction osteogenesis. A high cumulative survival rate was demonstrated by the implant placed in the distraction sites. Nonetheless, caution was suggested because of the high complication rate. The results of this meta-analysis ought to be interpreted with caution, due to the observed heterogeneity.