3차원 얼굴 영상을 이용한 상악 전방견인 치료 후의 연조직 평가
Soft tissue evaluation using 3-dimensional face image after maxillary protraction therapy
소속 상세정보
최동순:Choi Dong-Soon
이경훈:Lee Kyoung-Hoon/장인산:Jang In-San/차봉근:Cha Bong-Kuen
KMID : 0362720160540030217
Abstract
Purpose: The aim of this study was to evaluate the soft-tissue change after the maxillary protraction therapy using threedimensional (3D) facial images.
Materials and Methods: This study used pretreatment (T1) and posttreatment (T2) 3D facial images from thirteen Class III
malocclusion patients (6 boys and 7 girls; mean age, 8.9 2.2 years) who received maxillary protraction therapy. The facial
images were taken using the optical scanner (Rexcan III 3D scanner), and T1 and T2 images were superimposed using forehead area as a reference. The soft-tissue changes after the treatment (T2-T1) were three-dimensionally calculated using 15 soft-tissue landmarks and 3 reference planes.
Results: Anterior movements of the soft-tissue were observed on the pronasale, subnasale, nasal ala, soft-tissue zygoma, and upper lip area. Posterior movements were observed on the lower lip, soft-tissue B-point, and soft-tissue gnathion area. Vertically, most soft-tissue landmarks moved downward at T2. In transverse direction, bilateral landmarks, i.e. exocanthion, zygomatic point, nasal ala, and cheilion moved more laterally at T2.
Conclusion: Facial soft-tissue of Class III malocclusion patients was changed three-dimensionally after maxillary protraction therapy. Especially, the facial profile was improved by forward movement of midface and downward and backward movement of lower face.
키워드
Maxillary protraction; Class III malocclusion; Three-dimensional; Soft-tissue
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