Comparison of Soft-Tissue Profile in Mandibular Prognathic Patients after Treatment

Objectives: The purpose of this study was to compare the soft tissue profile between adult patients(non-surgical group) and patients who had a orthognathic surgery (surgical group) Methods: 40 patients(male 20, female 20) of over 18 years old and under 23 years old who successfully received orthodontic treatment with no extraction and had no congenital teeth, 47 patients(male 20, female 27) who had orthognathic surgery and genioplasty because of skeletal class III malocclusion was observed and compared using profile cephalometric radiography taken after the treatment was completed. Results:

Conclusion: 1. In both non surgical and surgical group, male group had more thicker upper and lower lips and soft tissues of chin than female group. 2. In both non-surgical and surgical groups, male and female groups both had upper lips positioned posterior and lower lip of male group positioned anterior(protrusion of lower lip is noticable) compared to the result of the research of profile cephalometric radiography of korean adults with normal occlusion which the malocclusion whitepaper publish community of Korean Association of Orthodontists reported. 3. There was no statistically significant difference whether the mandibular setback amount was great or not, or whether genioplasty was performed or not in the surgical group based on the measured figures. 4. Though there was statistically no significance, male and female group both showed that surgical group had larger nasolabial angle and mentolabial angle than non-surgical group and non-surgical group had larger facial profile angle.