Acute, recurrrent, and long-standing forward dislocation of the mandible are not common conditions compared with other conditions. Chronic recurrent dislocations of the mandible can be a significant problem. The understanding of the etiologic
factors
involved and the interrelations of the joint laxity to internal derangements of the disc are significant when considering the multiple factors of the TMJ disorders in general. A lot of literature shows that the treatment of painful condylar
hypermobility, subluxation, and dislocation is approached in a rational conservative way utilizing surgical methods when nonsurgical treatment is not effective. In recurrent dislocation of the temporomandibular joint, many ways of treatment were
reported such as eminectomy, eminence augmentation, and condylotomy. The final choice of the correct method(s) of tretment depends on a correct diagnosis and an understanding of the etiologic factors. Intra-oral vertical osteotomy is one of the
widely
used methods in correction of temporomandibular joint recurrent dislocation. But sagging of the TMJ after IVRO results in a bony step between the proximal segment and distal segment, and lateral rotation of the tempormandibular joint in a natural
joint
position. In this point of view, IVSRO has advantages. And healing is medular-to-medular minimum cortex-to-medular comparison with cortex-to-cortex healing in IVRO. The author thinks that IVSRO in correction of emporomandibular joint recurrent
dislocation. The author performed the IVSRO(Choung's Osteotomy) in a habitual TMJ dislocation patient and it lead to good, and favorable post-pperative results in both function and esthetics.
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