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Mandibular setback surgery is a surgical procedure performed along the occlusal plane to prevent bite opening on the anterior or posterior teeth and retract the lower jaw for both functional and aesthetic effects in patients with mandibular prognathism.
Although mandibular setback osteotomies reduce pharyngeal airway dimensions, evidence confirming post-surgical OSA was not found. Nevertheless, potential post-surgical OSA should be taken into serious consideration during the treatment planning of particular orthognathic cases.
Various fixing techniques have been proposed for osteosynthesis following a mandibular fracture or orthognathic surgery. These methods differ in terms of the number, material, and angle of insertion, as well as the arrangement and layout of the fixation parts used.
In cases of severe mandibular prognathism, bimaxillary surgery is the preferred method of treatment (BSSO setback combined with maxillary advancement). This is because excessive mandibular setback may result in obstructive sleep apnea and is also subject to higher rates of relapse.
Mandibular advancement has been regarded as a highly stable technique as compared to mandibular setback, which has been considered problematic. 4 During the last few decades, various studies have evaluated short-term changes; however, in recent years, the long-term skeletal and dental stability of these surgical techniques has been questioned.
Single-jaw rotational mandibular setback surgery can be done with a surgery-first approach by planning orthodontic rotation of the maxillary occlusal plane with the simulation of the postsurgical forward mandibular rotation.
The objective of this study was to evaluate whether changes in the technique for mandibular setback surgery since the introduction of RIF have improved postsurgical stability in Class III correction with setback alone and 2-jaw surgery.
The purpose of this study was to determine whether mandibular setback surgery using the recently introduced SF approach has acceptable mandibular skeletal stability comparable to conventional orthognathic surgery with presurgical orthodontics.
According to her paper, mandibular setback surgery is one of the three procedures which can be grouped in the “problematic category,” which was defined as a 40%–50% chance of 2–4 mm postsurgical change and a significant chance of more than a 4-mm change.
Mandibular sagittal split ramus osteotomy without presurgical orthodontic treatment was less stable than conventional orthognathic surgery for mandibular prognathism. Before performing a surgery-first approach, skeletal stability needs to be considered.
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