三维摄影技术结合锥形术CT评估颜面部不对称患者正颌手术前后的软硬组织变化

Abstract

Abstract: Objective: To study how the symmetry of hard and soft tissues of patients with facial asymmetry change after orthognathic surgery. Methods: 20 patients diagnosed with skeletal class Ⅲ malocclusion and facial asymmetry who underwent orthognathic surgery were enrolled. Three-dimensional facial scanning images (3dMd) and cone-beam computed tomography scans (CBCT) were obtained before and after the surgery. 25 landmarks were chosen to calculate symmetry indexes. Results: Among soft tissue, there was a statistically significant difference in symmetry index of upper lip edge point, lower lip edge point, left and right cheilion, pogonion, menton. Among hard tissue, there was a statistically significant difference in the symmetry index of B point, pogonion, menton. Conclusion: After orthognathic surgery, symmetry of soft tissue of lips and chin, hard tissue of mandible were improved a lot. However, there was no significant improvement in symmetry of nasal tissue, maxilla mandibular angle.

Key words: orthognathic surgery, facial asymmetry, threedimensional analysis

CLC Number:

R783.5

References 25

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Analysis of the soft and hard tissue changes after orthognathic surgery in patients with facial asymmetry by threedimensional photography combined with conebeam computed tomography scans

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