Abstract
In the treatment of skeletal jaw deformity, it is important to improve not only masticatory function but also esthetics with synthetic balance of the soft tissue morphology. In this study, profile changes in the cervicomental made by surgery in skeletal mandibular protrusion were examined, and the results were as follows:
1. Decreased throat length, increased lip-chin-throat angle, and increased cervicomental angle were observed.
2. A significant positive correlation was observed between the lip-chin-throat angle anteroposterior changes of the mandibular position.
3. A significant negative correlation was observed between the throat length and the vertical change of the mandibular position.
4. No correlation was observed between positional changes of the hyoid bone and the cervicomental soft tissue.
Due to the results above, it was suggested that the cervicomental soft tissue was altered after backward transposition of the mandible. In addition, the prognosis seems to become easier by applying the obtained regression curve.
