Deluded Normie
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Vertical ramus elongation and mandibular advancement by endobuccal approach: Presentation of a new osteotomy technique
Several surgical procedures have been proposed for the treatment of hyperdivergent dentoskeletal deformities. We propose a new osteotomy technique all…
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This technique differs from the conventional sagittal split osteotomy in that which the anterior osteotomy line is not continued until the basilar edge but stopped 5–6 mm above it. Cutting of the pterygomasseteric sling is systematically done allowing for the lowering of the mandibular angle. Osteosynthesis is performed by transjugal and intra-oral approaches, using two adjustable miniplates. Our supra-angular technique allows for both elongation of the ramus and advancement of the mandible. Unlike the vertical ramus osteotomy proposed by Caldwell-Letterman, external incision and intraoperative cervical hyperextension are not required.
Fig.1. Osteotomy drawing line.
Fig.2. Visualization of the osteotomy line in a three-dimensional reconstruction of postoperative CBCT, front view (left), right profile (middle) and rear view (right).
Fig.4. Case 1. Treatment outcomes at 6 months postoperatively. Frontal and profile photographs, profile X-ray and orthopantomogram in preoperative time (top) and at 6 month (bottom).
Fig.5. Case 2. Treatment outcomes at 1 year postoperatively. Frontal and profile photographs, profileX-ray and orthopantomogram in preoperative time (top) and at 1 year (bottom).
Fig. 6. Case 3. Treatment outcomes at 2 years postoperatively. Frontal and profile photographs, profileX-ray and orthopantomogram in preoperative time (top) and at 2 years (bottom).