Changes in hyoid bone and tongue positions, and oral cavity volume after mandibular setback by sagittal split ramus osteotomy
이상한, Liang Shan-Shan, 추연규, 최소영, 박인숙, Deng Fang-Cheng, 추연규, 최소영, 이상한,
소속 상세정보
( Liang Shan-Shan ) - 경북대학교 치의학전문대학원 구강악안면외과학교실
추연규 ( Chu Yeon-Gyu ) - 경북대학교 치의학전문대학원 구강악안면외과학교실
최소영 ( Choi So-Young ) - 경북대학교 치의학전문대학원 구강악안면외과학교실
박인숙 ( Park In-Suk ) - 계명대학교 의과대학 치과학교실
( Deng Fang-Cheng ) - Affiliated Hospital of Hainan Medical College College of Dentistry Department of Oral and Maxillofacial Surgery
추연규 ( Chu Yeon-Gyu ) - 경북대학교 치과대학 구강악안면외과학교실
최소영 ( Choi So-Young ) - 경북대학교 치과대학 구강악안면외과학교실
이상한 ( Lee Sang-Han ) - 경북대학교 치과대학 구강악안면외과학교실
KMID : 0360120090310040294
Abstract
Purpose: This retrospective study evaluated the changes in hyoid bone and tongue positions as well as oral cavity volume after mandibular setback by BSSRO.
Materials and Methods: 18 Koreans who underwent BSSRO to correct mandibular prognathism were studied. Lateral cephalograms were taken and traced preoperatively (T0), immediately (T1) and approximately 6 months postoperatively (T2). Submentovertex radiograghs were taken and traced before surgery (T0) and about 6 months after surgery (T2). The area and volume of oral cavity, the vertical and horizontal dimensions of the hyoid bone and tongue dorsum were measured.
Results: Mandibular setback surgery resulted in a significant reduction of lower oral cavity volume. The hyoid bone displaced posteroinferiorly immediately after surgery, and it tended to return to its original vertical position at 6 month after mandibular setback by BSSRO. The retropalatal space around tongue was maintained and the retrolingual space around tongue was reduced immediately postoperatively. The readaptation of tongue was not evident for that the follow up period was not long enough. No significant statistical correlations between the amounts of mandibular setback and the changes of oral cavity volume were observed.
Conclusion: Mandibular setback surgery resulted in a significant reduction of lower oral cavity volume, which was most likely attributable to the posterior movement of the mandible. More subjects and longterm observations should be performed to assess the changes of oropharyngeal configuration following mandibular setback surgery.
키워드
Oral cavity volum changes;Hyoid bone & tongue positions;Mandibular setback surgery(BSSRO)
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