Genioplasty with two-step horizontal advancement osteotomy for severe microgenia

Objective To introduce an effective surgical technique for correction of severe microgenia.Methods Two parallel osteotomies were performed under mental foramen through intraoral muscous incision.The mobilized segments were advanced like two steps in order to increase protrusion and heights of the chin and fixed rigidly with miniplate.Results From Oct,2003 to Sep,2010,25 cases with severe microgenia were treated with this technique.The chin moved forward 12mm in average and the reshaping contour of the chin is satisfied.Follow-up 6 months to 4 years,all the patients healed well with satisfactory aesthetic results.Conclusion The genioplasty with two-step horizontal advancement osteotomy as a reliable method for severe microgenia can significantly improve the appearance of the chin,coordination the proportion of facial contours.