Autogenous Bone Ring Versus Split Bone Block for Management of Posterior Atrophic Mandible

"Patients in this group will be treated with the bone ring technique. An implant drill will be used next to prepare central osteotomies corresponding to the final implant diameter to be placed in the center of the disc converting it to a bone ring."

Patients of this group will be treated with split bone block with simultaneous implant technique. The bone shell will be split into two bone shells each 1 \~ 2 mm in thickness using a disc.