After le fort 1 osteotomy, locating guides will be used to reposition the maxilla with pre-bent plates.

After le fort 1 osteotomy, Intermediate wafer will be used with intermaxillary fixation.

1. All patients will be treated under general anesthesia.

2. The surgical field will be scrubbed with povidone-iodine surgical scrub solution, followed by draping of the patient with sterile towels exposing only the area of surgery.

3. The surgical procedure of Le Fort I osteotomy will be performed which can be summarized as follows:

   1. External reference marking
   2. Incision and subperiosteal dissection
   3. Maxillary osteotomy
   4. Pterygomaxillary disjunction,
   5. Septal, vomerine, and lateral nasal osteotomies
   6. Down fracture
   7. Mobilization of the maxilla
   8. Application of stent in one group and the locating guide in the other group.
   9. Maxillary fixation
   10. Occlusal evaluation
   11. Wound debridement and closure

Postoperative CBCT was obtained after 2 weeks of surgery for comparison with the expected position of the maxilla in the preoperative virtual plan using 3-matic software in Mimics innovation suite software package. The preoperative planned final maxillary position was compared with the actual postoperative maxillary position by superimposing both STL models on each other with anatomical points along the orbital rims and the zygomatic arch used as reference points for alignment. The N points registration tool was used to obtain the alignment. Afterwards, using trim tool all parts were trimmed except that between the plates and the maxillary teeth crowns. Then the part comparison analysis tool was used to calculate the accuracy of the superimposition of the maxillary segment using point-based analysis algorithm after 2 weeks of surgery for comparison with the expected position of the maxilla in the preoperative virtual plan using Mimics innovation suite software.

The time taken between performing the Le fort 1 osteotomy till completion of plate fixation will be measured.

Will be assessed through a 10-point Visual Analogue Scale (VAS)