Three-dimensional analysis of lip soft tissue changes and related jaw changes in patients with skeletal class III malocclusion and facial asymmetry.
J Xray Sci Technol
; 29(5): 903-916, 2021.
Article
in En
| MEDLINE
| ID: mdl-34151882
ABSTRACT
OBJECTIVE:
To investigate three-dimensional soft tissue changes of lips and related jaw changes in patients with skeletal class III malocclusion and facial asymmetry using cone-beam computerized tomography (CBCT).METHOD:
This study included 46 CBCT scans of patients with aforementioned character before (T1) and 6-12 months after orthognathic surgery (T2). Subjects were divided into 2 groups according to two types of orthognathic surgery namely, the one-jaw surgery group who underwent bilateral sagittal splint ramus osteotomy (BSSRO) and the two-jaw surgery group who underwent Le Fort I osteotomy and BSSRO. Mimics 19.0 software are used for model reconstruction, landmark location and three-dimensional cephalometric analysis. Descriptive statistics and correlation analyses are used to investigate jaw hard tissue and lip soft tissue changes.RESULTS:
In one-jaw group, the mandible shows changes in contour and position (pâ<â0.05), and the surgery causes changes of lip structure on the deviated side. While in two-jaw group, jaws only show changes in spatial position, and surgery changes contour of bilateral lips and nasolabial angle (pâ<â0.05). At the same time, lip symmetry increases significantly in both groups postoperatively.CONCLUSIONS:
Orthognathic surgery can improve lip aesthetics in patients with skeletal class III malocclusion and facial asymmetry. However, changes induced by two surgical approaches are different. Surgeons should have a clear acquaintance with this difference to deal with different situations.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lip
/
Malocclusion, Angle Class III
Limits:
Humans
Language:
En
Journal:
J Xray Sci Technol
Journal subject:
RADIOLOGIA
Year:
2021
Document type:
Article
Affiliation country:
China