지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.12
- 수록면
- 385 - 392 (8page)
- DOI
- 10.5125/jkaoms.2020.46.6.385
이용수
초록· 키워드
오류제보하기
Objectives: This study evaluates soft tissue changes of the upper lip and nose after maxillary setback with orthognathic surgery such as Le Fort I or anterior segmental osteotomy.
Materials and Methods: All 50 patients with bimaxillary protrusion and skeletal Class II malocclusion underwent Le Fort I or anterior segmental osteotomy with backward movement. Soft and hard tissue changes were analyzed using cephalograms collected preoperatively and 6 months postoperatively.
Results: Cluster analysis on the ratios shows that 2 lines intersected at 4 mm point. Based on this point, we divided the subjects into 2 groups: Group A (less than 4 mm, 27 subjects) and Group B (more than 4 mm, 23 subjects). Also, each group was divided according to changes of upper incisor angle (≥4°=A1, B1 or <4°=A2, B2). The correlation between A and B groups for A?/ANS and Ls/Is (P<0.001) was significant; A?/A (P=0.002), PRN/A (P=0.043), PRN/ANS (P=0.032), and St/Is (P=0.010). Variation of nasolabial angle between the two groups was not significant. There was no significant correlation of vertical movement and angle variation.
Conclusion: The ratio of soft tissue to hard tissue movement depends on the amount of posterior movement in the maxilla, showing approximately two times higher rates in most of the midface when posterior movement was greater than 4 mm. The soft tissue changes caused by posterior movement of the maxilla were little affected by angular changes of upper incisors. Interestingly, nasolabial angle showed a different tendency between A and B groups and was more affected by incisal angular changes when horizontal posterior movement was less than 4 mm.
목차
등록된 정보가 없습니다.
참고문헌 (34)
참고문헌 신청
O'Ryan F / 1989 / Nasal anatomy and maxillary surgery. I. esthetic and anatomic principles / Int J Adult Orthodon Orthognath Surg 4:27~37
Betts NJ / 1993 / Changes in the nasal and labial soft tissues after surgical repositioning of the maxilla / Int J Adult Orthodon Orthognath Surg 8:7~23
Hack GA / 1993 / Long-term stability and prediction of soft tissue changes after LeFort I surgery / Am J Orthod Dentofacial Orthop 104:544~555
Schendel SA / 1976 / Superior repositioning of the maxilla : stability and soft tissue osseous relations / Am J Orthod 70:663~674
Chew MT / 2005 / Soft and hard tissue changes after bimaxillary surgery in Chinese Class III patients / Angle Orthod 75:959~963
Betts NJ / 1993 / Changes in the nasal and labial soft tissues after surgical repositioning of the maxilla / Int J Adult Orthodon Orthognath Surg 8:7~23
Hack GA / 1993 / Long-term stability and prediction of soft tissue changes after LeFort I surgery / Am J Orthod Dentofacial Orthop 104:544~555
Schendel SA / 1976 / Superior repositioning of the maxilla : stability and soft tissue osseous relations / Am J Orthod 70:663~674
Chew MT / 2005 / Soft and hard tissue changes after bimaxillary surgery in Chinese Class III patients / Angle Orthod 75:959~963
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