Abstract
We present a case of Crouzon disease treated by orthodontic treatment and Le Fort III midface advancement osteotomy. The patient was an 11-year-and-4-month-old female with a severe class III malocclusion and a skeletal open bite due to retarded maxillary growth, at initial examination. Preoperative orthodontic treatment was started with a multibracket appliance (0.018 slot, standard edgewise) after the maxillary second premolars and the mandibular first premolars were extracted. At the age of 15 years and 8 months, a Le Fort III osteotomy was performed for midface advancement. The skeletal and dento-alveolar changes following the surgical orthodontic treatment were evaluated. As a result, no relapse of the advanced midface was recognized. Also, the mandibular position, which had been rotated counter-clockwise with surgery, was not changed. Anterior open bite, however, occurred during the retention period. After applying a plate with a tongue crib instead of a Hawley-type retainer, her anterior relation improved.
