Analysis of masseter muscle in facial asymmetry before and after orthognathic surgery using 3-dimensional computed tomography / 대한치과교정학회지
Korean Journal of Orthodontics
; : 18-27, 2009.
Article
en Ko
| WPRIM
| ID: wpr-650711
Biblioteca responsable:
WPRO
ABSTRACT
OBJECTIVE: The purpose of this study was to understand the differences in masseter muscle (MM) between the shifted and non-shifted sides in facial asymmetry patients, and the changes shown by MM after mandibular surgery. METHODS: Pre- and post-operative CT scans were performed on 12 Class III patients with facial asymmetry who were treated by intraoral vertical ramus osteotomy and 10 subjects with normal occlusion. Using the V-works 4.0 program (Cybermed, Seoul, Korea), 3-dimensional images of the mandible, and MM were reconstructed, and evaluated. RESULTS: In the asymmetry group, the MM angle between the shifted and non-shifted sides was only significantly different (p < 0.05). Compared with normal occlusion, the asymmetry group showed a significantly smaller volume and maximum cross-sectional area in both sides of MM (p < 0.05). After mandibular surgery, the angle of MM (p < 0.01) and differences in angle between the shifted and non-shifted sides of MM (p < 0.05) were significantly decreased. The thickness in the maximum cross-sectional area was significantly increased (p < 0.01). After surgery, MM in facial asymmetry patients was similarly changed to those in the normal occlusion group except for widths. CONCLUSIONS: MM in facial asymmetry was definitely different from those in normal occlusion. However, this study suggests that MM changed symmetrically in conjunction with the mandible after proper mandibular surgery.
Palabras clave
Texto completo:
1
Base de datos:
WPRIM
Asunto principal:
Osteotomía
/
Asimetría Facial
/
Cirugía Ortognática
/
Mandíbula
/
Músculo Masetero
Límite:
Humans
Idioma:
Ko
Revista:
Korean Journal of Orthodontics
Año:
2009
Tipo del documento:
Article