Modified ridge splitting technique using conical space maintainers for delayed implant placement in highly atrophic maxillae.

Background: A low-morbidity surgical technique is described for the horizontal augmentation of highly atrophic alveolar ridges in which first surgical step implant placement is contraindicated. The aim of this case report was to present an alternative treatment for the rehabilitation of the atrophic maxilla. Methods: The technique involves a crestal corticotomy with transverse expansion of the vestibular and lingual cortical layers, followed by the placement of threaded titanium space maintainers between the expanded bone tables. Results: The resulting surgically created biological space within the residual socket is completely filled with blood of marrow origin and great osteogenic potenti…