Radiographic Evaluation of Crestal Bone Level Changes for Allografts or Xenografts Placed during Implant Placement: A Retrospective Study.

Aim: The aim of this study was to evaluate initial peri-implant crestal bone level changes when the allografts and xenografts were placed simultaneously during the implant placement.

Materials And Methods: This retrospective study was planned with the convenient sampling total of 77 implant sites that were bone grafted either with allografts (group I) or xenografts (group II). Using the periapical radiographs obtained after placement of bone grafts as baseline, the changes in the alveolar crestal bone around the implants were evaluated by comparing periapical radiographs taken at 3 months and 6 or 8 months after the surgery.