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- Title
The stability of soft tissue changes in patients with skeletal Angle Class III malocclusion after orthodontic - orthognathic treatments.
- Authors
LI Na; ZHANG Wen-juan; SHI Hong-tao; ZHANG Jun
- Abstract
PURPOSE: The purpose of this study was to analyze the changes of soft tissues at each treatment stage in patients with skeletal Angle Class III malocclusion after orthodontic-orthognathic surgery,and to assess the long-term stability after treatments. METHODS: 24 patients with skeletal Angle Class III malocclusion were included in this study. Standardized lateral cephalograms at the following stages were taken for each patient: T0-before treatment; T1-3 months after surgery; T2-1 year after surgery; T3-3 years after surgery. A total of 13 soft tissue landmarks were selected and the angles at different stages were evaluated. SPSS12.0 software package was used to calculate I and s,q test was used to evaluate the changes of the soft tissues. RESULTS: (1)Comparison between stage T0 and T1:I all landmarks had significant difference except the angle of A' UL-B' LL. (2)Comparison of the angles between stage T1 and T2 : the angles of S-N'-B, G-Sn-Pos, Ns-Sn-Pos, FH-SnPos and Z had significant difference.(3)Comparison of the angles between stage T1 and T3 : the angles of S-N'-B', G-Sn-Pos, Ns-Sn-Pos, FH-SnPos, Z and Ns-Prn-Pos had significant differences.(4)Comparison of the angles' changes between stage of T2 and T3 : only G-Sn-Pos had significant diversity. CONCLUSIONS: Angles related with Pos are more likely to relapse, but on the whole, the treatment effect is stable.
- Subjects
TISSUES; MALOCCLUSION; ORTHODONTICS; CEPHALOMETRY; TEETH abnormalities
- Publication
Shanghai Journal of Stomatology, 2009, Vol 18, Issue 4, p350
- ISSN
1006-7248
- Publication type
Article