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논문 기본 정보

자료유형
학술저널
저자정보
백승재 (원광대학교) 유지용 (원광대학교) 이장원 (원광대학교) 박원종 (원광대학교) 지영덕 (원광대학교) 최문기 (원광대학교) 최은주 (원광대학교) 권경환 (원광대학교)
저널정보
대한악안면성형재건외과학회 Maxillofacial Plastic Reconstructive Surgery Maxillofacial Plastic Reconstructive Surgery 제38권 제10호
발행연도
2016.10
수록면
1 - 10 (10page)
DOI
10.1186/s40902-016-0082-0

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초록· 키워드

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Background: The aims of this study are to evaluate the lip morphology and change of lip commissure aftermandibular setback surgery (MSS) for class III patients and analyze association between the amount of mandibularsetback and change of lip morphology. Methods: The samples consisted of 14 class III patients treated with MSS using bilateral sagittal split ramusosteotomy. Lateral cephalogram and cone-beam CT were taken before and about 6 months after MSS. Changes inlandmarks and variables were measured with 3D software program Ondemand™. Paired and independent t testswere performed for statistical analysis. Results: Landmarks in the mouth corner (cheilion, Ch) moved backward and downward (p < .005, p < .01). However, cheilion width was not statistically significantly changed. Landmark in labrale superius (Ls) was not alteredsignificantly. Upper lip prominence angle (ChRt-Ls-ChLt °) became acute. Landmarks in stomion (Stm), labraleinferius (Li) moved backward (p < .005, p < .001). Lower lip prominence angle (ChRt-Li-ChLt °) became obtuse(p < .001). Height of the upper and lower lips was not altered significantly. Length of the upper lip vermilionwas increased (p =< 0.01), and length of the lower lip vermilion was decreased (p < .05). Lip area on frontalview was not statistically significantly changed, but the upper lip area on lateral view was increased andchange of the lower lip area decreased (p > .05, p < .005). On lateral view, upper lip prominent point (UP)moved downward and stomion moved backward and upward and the angle of Ls-UP-Stm (°) was decreased. Lower lip prominent point (LP) moved backward and downward, and the angle of Stm-LP-Li (°) wasincreased. Li moved backward. Finally, landmarks in the lower incisor tip (L1) moved backward and upward,but stomion moved downward. After surgery, lower incisor tip (L1) was positioned more superiorly thanstomion (p < .05). There were significant associations between horizontal soft tissue and corresponding hardtissue. The posterior movement of L1 was related to statistically significantly about backward and downwardmovement of cheilion. Conclusions: The lip morphology of patients with dento-skeletal class III malocclusion shows a significant improvement after orthognathic surgery. Three-dimensional lip morphology changes in class III patients after MSS exhibited that cheilion moved backward and downward, upper lip projection angle became acute, lower lip projection angle became obtuse, change of upper lip area on lateral view was increased, change of lower lip area decreased, and morphology of lower lip was protruding. L1 was concerned with the lip tissue change in statistically significant way.
#Three-dimensional evaluation #Class III malocclusion #Lip morphology #Mandibular setback surgery #Cheilion

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참고문헌 (24)

참고문헌 신청
Jokic D / 2013 / Soft tissue changes after mandibular setback and bimaxillary surgery in class III patients / Angle Orthod 83:817~823 google schola Arnett GW / 1999 / Soft tissue cephalometric analysis: diagnosis and treatment planning of dentofacial deformity / Am J Orthod Dentofacial Orthop 116:239~253 google schola Hoffmann J / 2005 / Validation of 3D-laser surface registration for image-guided cranio-maxillofacial surgery / J Craniomaxillofac Surg 33:13~18 google schola Katsumata A / 2005 / 3D-CT evaluation of facial asymmetry / Oral Surg Oral Med Oral Pathol Oral Radiol Endod 99:212~220 google schola Bjork N / 1971 / Changes of facial profile after surgical treatment of mandibular protrusion. A cephalometric study, 1 and 11 years after treatment / Scand J Plast Reconstr Surg 5:41~46 google schola

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