One-stage Versus Two-stage Inverted U-shaped Ridge Splitting

"A full mucoperiosteal flap was raised using the sharp periosteal elevator to expose the bone crestally and buccally.~An inverted U-shaped bone cut, down to the cancellous bone, was done in the undercut area with a piezoelectric device.~The horizontal bone cut was made apical to the most concave point in the undercut area with a distance of 3 mm.~The two vertical bone cuts were placed at least 1 mm away from the adjacent roots and extended beyond the undercut area.~The released bone end was minimally elevated using a periosteotome through a greenstick fracture.~All implants were installed with the implant shoulders flush to the bone level using a low-speed drilling procedure."

"The first surgery is the same as one stage ridge splitting Four weeks later, after revascularization between the bone block and the mucoperiosteum, the second surgery will be performed.~A crestal incision was done and the envelope flap slightly elevated to preserve the blood supply.~The implants will be placed in the same manner as one stage ridge splitting"