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A LATERAL CEPHALOMETRIC STUDY ON THE SOFT TISSUE CHANGES AFTER ORTHOGNATHIC SURGERY IN PATIENTSDIAGNOSED AS MANDIBULAR PROGNATHISM IN AJOU UNIVERSITY HOSPITAL

Other Title
아주대학교 병원에 내원한 하악전돌증 환자의 악교정수술후 연조직 변화에 관한 측모 두부방사선 계측학적 연구
Authors
이, 정근; 이, 승훈; 이, 재봉; 화, 병남
Citation
Taehan Ch'ikkwa Uisa Hyophoe chi, 38(7):648-655, 2000
Journal Title
Taehan Ch'ikkwa Uisa Hyophoe chi; Daihan c̆igwa üisa hyebhoi-ji; Journal of the Korean Dental Association; 대한치과의사협회지
ISSN
0376-4672
Abstract
It is essentianl for patients with mandibular prognathism to be treated by surgical means in correction of class Ⅲ patterns. In addition to fuctional aspect of the stomatognathic system, esthetic improvement of lower facial profile counts for something. Purpose of this study is the

establishment of standard in soft tissue changes after orthognathic surgery in patients with mandibular prognathism.

Two patient groups were selected, one was consisted of patients with mandibular prognathism who had undergone bilateral sagittal split ramus osteotomy (BSSRO) and the other was composed of patients with the same diagnosis who had undergone BSSRO plus posterior repoitioning genioplasty.

The lateral cephalographs were taken preoperatively and at postoperative 6 month, traced with 0.5mm-thick pencil, and measured, respectively. The tracing and measurement were done by the author and by another collegeue with time difference to minimize systematic errors.

The ratio of horizontal movement between soft and hard tissues has significnt correlations in lower facial profiles. The ratios are as follows; In BSSRO group, the rations were 1.00 for Si/B, 0.95 for Li/Id, and 1.02 for Pg'/Pg, respectively. In BSSRO plus posterior repositionning genioplasty group, the ratios were 1.06 for Si/B, 0.98 for Li/Id. But soft tissue pogonion (Pg')

and pogonion(Pg) has moderate correlation(correlation coefficient was 0.766) with the ratio (Pg'/Pg) 0.774 in BSSRO plus posterior repositioning genioplasty group.

We have endeavored after standards for orthognathic surgery for mandibular prognathism in BSSRO and BSSRO plus posterior repositioning genioplasty. The soft tissue profiles were generally

predictable after BSSRO and BSSRO plus posterior repositioning genioplasty, but careful prediction is needed in prediction of soft tissue pognoion in BSSRO plus posterior repositioning genioplasty case.
Keywords
orthognathic surgerysoft tissue changes
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Journal Papers > School of Medicine / Graduate School of Medicine > Dentistry
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