Following tooth loss, augmentation of the extensively atrophized alveolar ridge of the maxilla may be necessary, in order to restore the masticatory function by the replacement of teeth anchored on implants. A number of bone augmentation methods are available for the acceptance of implants. The aim of the presented report is to summarize our experience relating to the use of free monocortical bone grafts originating from the hip (spina iliaca anterior superior) for purposes of onlay-plasty.