Abstract
Purpose: The purpose of present study was to review the literature regarding the postoperative skeletal stability in the treatment of mandibular prognathism after isolated sagittal split ramus osteotomy (SSRO) or intraoral vertical ramus osteotomy (IVRO). Materials and Methods: The articles were selected from 1980 to 2020 in the English published databases (PubMed, Web of Science and Cochrane Library). The articles meeting the searching strategy were evaluated based on the eligibility criteria, especially at least 30 patients. Results: Based on the eligibility criteria, 9 articles (5 in SSRO and 4 in IVRO) were examined. The amounts of mandibular setback (B point, Pog, and Me) were ranged from 5.53–9.07 mm in SSRO and 6.7–12.4 mm in IVRO, respectively. In 1-year follow-up, SSRO showed the relapse (anterior displacement: 0.2 to 2.26 mm) By contrast, IVRO revealed the posterior drift (posterior displacement: 0.1 to 1.2 mm). In 2-year follow-up, both of SSRO and IVRO presented the relapse with a range from 0.9 to 1.63 mm and 1 to 1.3 mm respectively. Conclusion: In 1-year follow-up, SSRO presented the relapse (anterior displacement) and IVRO posterior drift (posterior displacement). In 2-year follow-up, both of SSRO and IVRO showed the similar relapse distances.
Highlights
A multimethod approach of orthognathic surgery [1,2,3,4,5,6,7,8] is used to correct mandibular prognathism
161 articles were retained by further narrowing to the domains of “mandibular setback” and “stability” (PubMed, n = 73; Web of Science, n = 80; Cochrane Library, n = 8)
62 articles were retained by further narrowing to the domains of
Summary
A multimethod approach of orthognathic surgery [1,2,3,4,5,6,7,8] is used to correct mandibular prognathism. Patients are able to open their mouth; the airway is more likely to remain unimpeded, improving their speaking condition and oral hygiene. The mandible can be moved immediately after the surgery, which enables patients to maintain the required nutrition in the early postoperative period and consume normal food sooner. SSRO increases patients’ comfort after surgery and facilitates their postoperative orthodontic treatment. The chance of injury to the mandibular alveolar nerves is higher; patients have a higher risk of experiencing neurosensory disturbance in the lower lip following surgery. The sequelae of malocclusion can be improved through postoperative orthodontic treatment; in severe cases, patients must undergo condylar repositioning
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