Journal of Dental Medicine (Feb 2004)
An investigation on the incidence of neurosensory disturbances of inferior alveolar nerve and condylardisplacement with Choung (IVSRO) osteotomy
Abstract
The choung osteotomy (Intraoral Vertico- Sagittal Ramus Osteotomy) has developed"nsince 1992 in the treatment of mandibular prognathism. In IVSRO, osteotomy plane is theoretically parallel to"nthe original sagittal plane and thereby attempting to decrease the incidence of condylar dispacement. This"nosteotomy designed additionally to decrease neurosensory disturbances."nPurpose: The aim of this study was to evaluate the incidence of neurosensory deficit and condylar"ndisplacement with IVSRO and Sagittal Split Ramus Osteotomy (SSRO)."nMaterials and Methods: In this study, mandibular set back surgery was accomplished upon 7 patients by"nchoung osteotomy. In addition to choung osteotomy, in 2 patients Lefort 1 osteomy was performed for"nmaxillary protrusion and for 2 other patients, chain surgery was performed. Variables such as the"nneurosensory disturbances of inferior alveolar nerve and condylar displacement following choung osteotomy"nwere investigated. All the patients were followed up one year after osteotomy. OPG, Lateral Cephalogram and"nSubmentovertex radiographies were take pre and postoperatively for all patients."nResults: No statistically significant differences were found in condylar displacement (P>0.5). However, Mc"nNemar analysis showed significant difference of neurosensory deficit between IVSRO and SSRO (P=0.001)."nConclusion: It is suggested that choung osteotomy is a safe procedure for mandibular surgery.
