Abed Yossi, Har-Zion Gilad, Redlich Meir
Department of Orthodontics, Hebrew University, Jerusalem, Israel.
Angle Orthod. 2009 Mar;79(2):235-9. doi: 10.2319/030608-133.1.
To assess changes in lip posture following debonding of labial appliances on the basis of a new soft tissue analysis performed by computerized tools with the use of conventional nonstandardized profile photographic pictures.
Profile photographs of 33 patients were taken just before and just after debonding of labial brackets. Pictures were examined twice through custom-made analysis in which Viewbox software was used. The validity of this new analysis was assessed in a preliminary study. A reference line was constructed between the center of the tragus and the outer canthus. The point where this elongated line intersected with the profile was coined nasion-modified and served as the vertex point for angles used to evaluate the prominence of the lips. The final position of the lines was determined when they were tangent to the appropriate landmarks. Analysis of variance (ANOVA) and t-tests for paired differences were used.
The reproducibility of this photoanalysis was confirmed in the preliminary study, in that no significant differences were found between measurements (P < .05). No statistically significant differences were noted in lip posture between pre-debonding and post-debonding pictures (P < .05).
In keeping with the design of this study, soft tissue profile photoanalysis showed that the presence of bonded labial appliances had no effect on lip posture.
基于使用传统非标准化侧面照片通过计算机工具进行的新软组织分析，评估唇侧矫治器拆除后唇部姿势的变化。
在33例患者唇侧托槽拆除前及拆除后即刻拍摄侧面照片。通过使用Viewbox软件的定制分析对照片进行两次检查。在一项初步研究中评估了这种新分析方法的有效性。在耳屏中心与外眦之间构建一条参考线。这条延长线与侧面轮廓相交的点被定义为改良鼻根点，并作为用于评估唇部突出度的角度的顶点。当这些线与相应的标志点相切时确定其最终位置。使用方差分析（ANOVA）和配对差异t检验。
在初步研究中证实了这种照片分析的可重复性，即测量值之间未发现显著差异（P < 0.05）。拆除矫治器前和拆除后照片之间的唇部姿势在统计学上没有显著差异（P < 0.05）。
根据本研究的设计，软组织侧面照片分析表明，粘结的唇侧矫治器的存在对唇部姿势没有影响。
