The skeletal stability after maxillo-mandibular osteotomy with a “physiological positioning strategy”

Ohba, Seigo; Nakao, Nobuhiro; Nakatani, Yuya; Kawasaki, Tatsuya; Minamizato, Tokutaro; Koga, Takanori; Kohara, Haruka; Yoshida, Noriaki; Asahina, Izumi

doi:10.1016/j.bjoms.2014.08.003

Cited by 13 publications

(5 citation statements)

References 11 publications

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“…The line wherein S-N rotated by 7 degrees with S as the fulcrum was referred to as the x axis, as previously described 13 . The perpendicular line to the x axis which go through S was referred to as the y axis, as previously described 14 . This x - y coordinate was used to assess the change in points.…”

Section: Methodsmentioning

confidence: 99%

“…13 The perpendicular line to the x axis which go through S was referred to as the y axis, as previously described. 14 This x-y coordinate was used to assess the change in points. The following soft tissue distances were measured: (1) from SGLB to Sn, (2) from Sn to Me ′, (3) from Sn to STMs, (4) from STMi to Me′, and (5) from LL-Pog′ to B′.…”

Section: Cephalometric Analysismentioning

confidence: 99%

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Occlusal Plane Angle as a Key Factor for Chin Protrusion After Mandibular Osteotomy in Skeletal Class III

Shido,

Morita,

Nishioka-Sakamoto

et al. 2023

Journal of Craniofacial Surgery

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There is no treatment algorithm to decide whether maxillomandibular or mandibular osteotomy alone should be performed in borderline cases. This study assessed the factors that affect the changes in soft tissue after mandibular setback. Patients who underwent mandibular osteotomy alone to correct mandibular protrusion were included in this study. Hard and soft tissue analyses were performed on lateral cephalograms before and 12±3 months after surgery. The popular points were set for referencing hard and soft tissues on the lateral cephalogram. Nasolabial, labiomental, and soft tissue facial plane angles were measured for the soft tissue assessment. To assess the mandibular setback amount, SNB was calculated. Twenty-one patients were included in this study. The nasolabial angle was increased after surgery and its change significantly correlated with the change in SNB (P=0.00815). The change in soft tissue facial plane angle after surgery per change in SNB significantly correlated with the occlusal plane angle (P=0.0009). An occlusal plane angle of at least 15.45 degrees was required for the SNB and soft tissue facial plane angle to change to the same degree. The occlusal plane angle (whether or not it was ≥15.45 degrees) may help in determining the surgical approach in borderline cases, specifically on whether maxillomandibular or mandibular osteotomy alone should be performed if the mandibular setback is simple.

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Section: Methodsmentioning

confidence: 99%

Section: Cephalometric Analysismentioning

confidence: 99%

Occlusal Plane Angle as a Key Factor for Chin Protrusion After Mandibular Osteotomy in Skeletal Class III

Shido,

Morita,

Nishioka-Sakamoto

et al. 2023

Journal of Craniofacial Surgery

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“…By comparing Cephalometric tracings of 2 days, 6 and 12 months postoperatively he found out an anterior mandible relapse was \1 mm, and proper post-operative planning would compensate the increased superior relapse. Rocha et al [9] in their study concluded that there are significant long term changes with counterclockwise rotation of the maxillamandibular complex and mandibular advancement procedures, but these were clinically acceptable as they were found to be \2 mm, while Ohba et al [10] state that there was reliable stability of both the maxilla and mandible after maxilla-mandibular osteotomy with physiological positioning in patients with mandibular prognathism. It was showed by conducting cephalometric analysis, pre-operatively, immediately, and more than 1 year after maxillomandibular osteotomy.…”

Section: Post Surgical Outcomes and Complicationsmentioning

confidence: 98%

Orthognathic Surgery: A Review of Articles Published in 2014–2015

Singh

Sudhakar

Mohanty³

et al. 2016

J. Maxillofac. Oral Surg.

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“…Intermaxillary fixation was released 1 day after surgery, and jaw exercise was initiated with elastics and continued during hospitalization as described elsewhere. 7,8 The patient developed a severe cough with expectorated sputum and a high fever of up to 41.38C in the night. The INFLU test was negative.…”

Section: Clinical Reportmentioning

confidence: 99%

A Patient With Aspiration Pneumonia After Mandibular Osteotomy With Genioplasty

Ohba

Kawasaki²,

Hashimoto³

et al. 2016

Journal of Craniofacial Surgery

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Orthognathic surgery including maxillary osteotomy, mandibular osteotomy, and genioplasty is a reliable treatment strategy for jaw deformity. However, there are some complications associated with these surgeries, including neurovascular damage and abnormal bleeding. The authors present here a patient of aspiration pneumonia after mandibular osteotomy.An 18-year-old female patient underwent sagittal split ramus osteotomy and genioplasty for mandibular prognathism. She began choking and coughing immediately after surgery. She was diagnosed with aspiration pneumonia based on chest radiography and computed tomography findings. Her hyoid bone was shifted 23 mm inferiorly after surgery, and this movement may have caused swallowing dysfunction. She was treated with intravenous antibiotics and discharged on the 18th postoperative day.Although the hyoid bone is transiently shifted inferiorly by mandibular setback with or without genioplasty, this shift does not usually affect swallowing function. Damage to the suprahyoid muscles during genioplasty may cause both an inferior shift and dysmobility of the hyoid bone. Therefore, surgeons must be careful not to damage the suprahyoid muscles at the lingual site osteotomy in genioplasty to avoid this complication.

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The skeletal stability after maxillo-mandibular osteotomy with a “physiological positioning strategy”

Cited by 13 publications

References 11 publications

Occlusal Plane Angle as a Key Factor for Chin Protrusion After Mandibular Osteotomy in Skeletal Class III

Occlusal Plane Angle as a Key Factor for Chin Protrusion After Mandibular Osteotomy in Skeletal Class III

Orthognathic Surgery: A Review of Articles Published in 2014–2015

A Patient With Aspiration Pneumonia After Mandibular Osteotomy With Genioplasty

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