* Patients will be collected from faculty of dentistry * bilateral vertical ramus osteotomy (VRO )with iliac graft group (group I):- 10 patients will be treated via VRO and iliac crest or * bilateral sagital spilt osteotomy (BSSO) group (group II):- 10 patients will be treated via BSSO * All patients will be studied by comprehensive clinical oral and maxillofacial examination and lateral cephalometric radiographic analyses, within 1 week before the surgery (T0), immediately after the surgery (T1), and 6 months after surgery (T2). * All lateral cephalometric radiographs and clinical photographs must be standardized for all cases. * After pre-surgical orthodontic treatment , a lateral cephalograph Will be obtained for planning the surgical movement of both jaws * Surgical models and surgical stent will be fabricated. * All surgical procedures will be performed under nasal intubation and general anesthesia to surgically reposition the maxilla in standard LeFort I setback fosteotomy; the BSSO group will be underwent BSSO, and VRO group will be underwent VRO * The bony segments will be fixed in the new position with the use of custom made plates (specific for each patient )
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
20
in the VRO group all patient will undergo vertical ramus osteotomy surgery with iliac graft to correct the sever mandibular defficiency
all patients in this group will undergo to bilateral sagittal split osteotomy to correct the sever mandibular deficiency
Beni-Suief University
Beni-seuf, Egypt, Egypt
RECRUITINGskeletal stability
Skeletal stability will be assessed by lateral cephalometric x-ray. It will be done pre operatively, immediate postoperative, and 6 months later
Time frame: 6 months
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