Modified intraoral sagittal split ramus osteotomy for correction of mandibular prognathism

Objective To explore which of the two methods of modified or classical technique of intraoral Sagittal Split Ramus Osteotomy (SSRO) is the more appropriate and effective method for correction of mandibular prognathism. Methods 95 patients suffering from mandibular prognathism or accompanied by other deformities have been operated on by modified or classical technique of intraoral SSRO. 43 by modified SSRO and 52 by classical SSRO. Results In team treated by classical SSRO, 9 cases disorder of local sensibility, 1 case mandibular fracture during the cleavage of the ascending ramus, 1 case of significant bleeding, 1 case postoperative infection, 3 cases postoperative relapse. 2 cases disorder of local sensibility, 1 case postoperative relapse, no mandibular fracture, significance bleeding, postoperative infection, and other complications occurred to the team treated by modified SSRO. With routinely follow-up ranging from 3 months to 7 years. The face type and dental articulation of all the patients improved greatly. Conclusion Since modified technique of SSRO has more advantages that conventional classical technique can't compare with: such as more convenient manipulation, shorter-time operation, sooner postoperative recovery, less risk of operation, enough backward space and fewer complications, et al; it is the preferred method for the correction of mandibular prognathism, especially for those severer patients accompanied by mandible deviation. Accompanied by regularity and in time pre- and post-operational orthodontic therapy, it will be more widely used and has a glorious future.