Natto ZS, et al. – This study was done to identify and rank different ridge preservation procedures using allograft, xenograft, or extraction only by dimensional changes in ridge width and height after tooth extraction. No significant difference was identified between treatments nor inconsistency between the direct and indirect estimates. In addition, none of the chosen interventions were statistically significant compared with any other treatment. All treatment options brought about a minimal bone loss in alveolar ridge width and height.